Wednesday, October 28, 2015

蓼科山:Tateshina-yama mountain

Yatsugatake(Minami-yatsu), and Japanese Alps (south)
seen from the summit of Mt. Tateshina

10:45 (0:00) 鳥居(7合目駐車場)0min
10:52 (0:07) 馬返し 7min (標準20min)
11:11 (0:26) 天狗の露地 19min
11:27 (0:42) 将軍平 16min (馬返しから35min, 標準50min)
11:53 (1:08) 頂上の小屋 26min (標準30min、ここまで68min,標準100min)
11:55 (1:10) 頂上の柱 2min
頂上の標柱(2530.7m)

12:02 (0:00) 頂上の小屋 0min
12:19 (0:17) 将軍平 17min (標準20分)
12:33 (0:31) 天狗の露地 14min
12:45 (0:43) 鳥居 (将軍平から28分、標準50min)

上り70分(標準100分)、下り43分(標準70分)
合計2時間(120分、標準タイムの70.5%)

上りは最後の岩登りが途中から恐怖であった。過呼吸にならないよう、ゆっくりいった。
下りになると一転、岩山を跳ねて下りられるようになるとは、人間の適応力とはすごい。
一方で、その後の下りでは3回転倒。浮き石に足が滑り、2度は手を付き、ローリングするような激しい転倒。太ももの筋力が急激に落ちたのが原因。踏ん張れない。斜面に転がるナナカマドの赤い実を避けようかな、などと考えていると、注意力が散漫になってトタンに足が滑る。

Look back at the place on my way to the summit:
Mt Asama (volcano) beyond Maekake-yama

Saturday, March 16, 2013

Hokone volcano: eruption might be near

Last November, I visited Hakone for the first time, and was impressed by the active hot spring where water vapor comes up from the underground regularly. "Soon, I would like to come back here to enjoy hot spring bathing" was my thought then.

However, the things develop against my expectation: there is a report recently that the Hakone volcano seems to wake up from the 3000-years dream...(In Japan, China and other countries, there is no historic record of the eruption of the Hakone volcano.) See for example here.

A number of local earthquakes continues these days, which are so local that people in Tokyo,
or even those who are just outside the Hakone region do not feel any vibrations of the ground. Scientists reported that there is a slight expansion of the whole mountain, indicating the magmatic activity is escalating gradually.

Many people wonder whether this phenomenon is connected with the Big Earthquake in the East Japan two years ago.

Wednesday, March 13, 2013

Taking a walk in Tokyo: Ultraman and Godzilla

Spring is near as the southern wind becomes stronger in Tokyo these days. A glimpse of Spring landscape can be already seen between windy days. Plum and daffodils started to bloom, and cherry blossom is expected within a week or so. Air temperature fluctuates up and down, but its average is steadily going up. Unusually cold winter this year is about to be over soon.

Feeling well by a warm sunshine for the first time since the end of last November, I decided to take a walk.

Several weeks ago, I was visited by a little nephew who is now absorbed in "Ultraman". When I was a kid, I was also absorbed in it in a similar way, such as arranging Ultraman figures around pillow at sleep, studying the effect of spacium ray, and practicing how to shoot the ray (in mind), etc. In the end of the day, we found that we are sharing the common "cultural" background. My interest in Ultraman flares up again for the first time since my graduation from elementary school.

Next week, I went to a rental-DVD shop for several episodes of Ultraman and Ultraseven. My vague memory was refreshed as I watched. I started to recall the first several stories gradually. As a scientist, I can tell now that there are many wrong scientific explanations and strange astronomical objects, but I know these things are acceptable as an entertainment for kids in 1960s and 70s. I was rather impressed by beautiful landscapes of Japan recorded in the programme: mountains, lakes and sea shores are far more beautiful than they are at present. "A comparison of the scenes in Ultraman with the present situation may be very interesting" is what I thought. Actually, this is the second reason for taking a walk.

The production company of Ultraman (called "the Tsuburaya production") used to be located in the west part of Tokyo called Kinuta, which is near Seijo, Setagaya district.  In the boundary of Kinuta and Seijo, a small river called "Sengawa" is running along the small cliff called "Kokubunji-gaisen", which is the west tip of the Tokyo plateau. Along the river is a nice footpath, so I headed to the Seijo station to walk down to the riverside.

The first feature I found was the Toho movie studios in Seijo, where Godzilla was produced. There is a bronze statue of Godzilla in the entrance, which is so nice to see and touch!
Godzilla standing in front of the Toho studios.
On the walls of the studio buildings, there are pictures drawn, such as "Mothra" and "Seven samurai of Akira Kurosawa". In fact, Kurosawa lived near to the studios. (Mifune also lived nearby. His property was purchased by Kobe-ya, a restaurant company, and you can take a break there after taking a walk.)

River railing of Godzilla's paw along the river Sengawa.
In the river railings near the studios, you can find a special plate depicting the paw and shadow of Godizlla's.
It is surprising to know that the production company of ultraman used to be located very near to this place where I took a picture of the Godzilla river railing. It is less than five minutes walk. Hopefully, there should be a movie, "Godzilla vs. Ultraman". But it was not realised... I remember that there was a statue of Ultraman-A in the entrance to the production, but it does not stand there any more. Unfortunately, the production company bankrupted several years ago, and was purchased by an investment company. New ultraman series are produced somewhere else in Tokyo at present.

Further down along the river,  you find yourself in public apartment buildings for low-income households. In 1960s, living in this type of the public apartment complex was fashionable, and middle-class people rushed to apply to a room as soon as new buildings were built. But now, the situation was drastically changed. Only those who cannot afford to buy a house remain in the apartment.  Anyway, in the DVD I watched, there is a scene in the second episode of Ultraseven ("The terror of Green") showing the landscape of the apartment complex.

A scene from the second episode of Ultraseven, "The Terror of Green".
An object in the circle still remains in the place.

The present situation of the scene above.
An object seen in the upper right in the Ultraseven episode still remains in the same place, that is, in front of the No.20 apartment building. The object is actually for kids. They can climb, they can hide in the hole, or whatever they want. The shape of the object is based on the shape of gastropods, which can be easily understood if you walk around the side of the object.

Beyond the end of the street is the small cliff of "Kokubunji-gaisen", and I climbed there to reach the public park, "Okura koen".
Entrance to the Okura-koen public park.
On top of the small cliff, there is an athletic playground for kids, as well as tennis courts which are usually occupied by senior people, who have time and money than we do... The park was established early in the previous century. As a proof for that, you can find old boundary stones in the edge of the park.
Boundary stones set by Tokyo-fu (東京府),the former municipal body before Tokyo-to(東京都), 
the present organization. (Left picture: front with an inscription of "東京府"; right picture: the other side with a symbol of Tokyo-fu, originating from a Chinese character of "East, 東".)

According to Wikipedia, the former municipal body of Tokyo, that is, Tokyo-fu, was introduced soon after the surrender of the Tokugawa to the Meiji government in the end of the Edo period. Tokyo-fu continued to exist until 1943, two years before the Japan's defeat against the US in the WWII. The reason for making Tokyo-to government (東京都)was to collect money and resources to the capital from all over Japan whatever people say. At any rate, the stones we can see today were placed there in the WWII period, and have been there since then!

In this park and the park next to it (Kinuta public park), plum (Ume) trees were blooming nicely, giving a very impression that Spring is almost there.
Plum blooming in Kinuta public park
In the Kinuta park, there is a cafe offering nice coffee and French pancake (crepe). I often visit the cafe with my sheep dog for lunch. My favorite table is next to the spring fountain outside the cafe. In sunny days, you can enjoy blue sky and warm spring sun for hours. There is a restaurant inside the art museum (Setagaya Museum), but it is more formal and you cannot enjoy lunch with your dog...

Leaving the public parks of Okura and Kinuta, I headed to "Ultraman street" in Soshigaya. The highstreet in Soshigaya decided several years ago to promote themselves by the help of Ultraman, because the Tsuburaya production used to be next to them. In the square of the Soshigaya station, there is a statue of Ultraman. There are other ultraman kinds in the highstreet, but I don't find them all yet. The interesting thing is the street light, which looks like a head of Ultraman. In daytime, the background is full of disturbs, such as electric wires and apartment buildings, which melts the shape of the Ultraman lights. But at night, only the lights can be seen, so that the shape of Ultraman becomes clearer and more vivid!

Ultraman street lights in Soshigaya


Further walk along the high street, you can find flying statues of Ultraman in the gates to the street.This time, I found Ultraman Zoffy at the west gate. He is literally flying, which is so fantastic in the blue sky. 
Zoffy flying over the Soshigaya highstreet.
This is it for this time.

Monday, December 17, 2012

Reading the national report of Ukraine (2): Lessons from Chernobyl to Fukushima


I haven't finished reading the report document yet (totally over 300 pages), but in addition to the zone classification, there are other useful information and pedagogical analyses already in the first several pages.

In page 14, there is a paragraph saying:
The USSR undoubtedly achieved considerable success in developing nuclear science and engineering, especially in military industry. However, this success was too much politicized. At the same time, shortcomings and errors that led to large disasters both at civil and military nuclear facilities were concealed.  ----- All this resulted in the fact that infallibility moods become firmly established in the nuclear engineering. ---- "The Soviet nuclear reactors are the best in the worlds. " This (attitude) was also eloquently seen in response to the accident happened at the American Three Mile Island Nuclear Power Plant in 1979, when the leaders of the USSR nuclear industry announced that "such accident was impossible under socialism". -----
This analysis can be applied literary "exactly" to the Fukushima nuclear disaster, except the "under socialism" part, which should be replaced with "in Japan".

After nearly 30 years since the Chernobyl catastrophe, no Japanese politicians as well as bureaucrats learned the lessens from the Chernobyl. The ancient Romans used to say "Errare Humanum est", but this repetitive mistake by the Japanese government is too much and unacceptable to me.

Sunday, December 16, 2012

Reading "National report of Ukraine: Twenty-five years after Chernobyl Accident"

I am reading now a report from Ukraine, "Twenty-five years after Chornobyl accident: Safety for the Future", which can be downloaded from here. (I did not know this until recently:  in Ukrainian, the correct spelling for "Chernobyl" is "Chornobyl". See Wikipedia.)  The reason for my reading of this document is that I wanted to know how the Ukrainian government set the radioactively contaminated zones.  There are four zones in Ukraine: (1) Exclusion zone, (2) Zone of implicit (mandatory) resettlement for more than 5 mSv/year, (3) Zone of guarantee voluntary resettlement for 1 to 5 mSv/year, (4) Zone of enhanced radiation monitoring for 0.5 to 1 mSv/year.

0.5 mSv/year corresponds to 0.06 μSv/h, which is observed everywhere not only in Tokyo, but in many parts in Japan (and maybe in many places in the world).  Usually, 0.06 μSv/h is regarded as a  "low" dose. When this zone classification was reported in NHK (Japan Broadcasting Cooperation), I thought something is wrong: 0.06 μSv/h is too low as a radiation monitoring district. That is why I decided to read the original report by myself.

First of all, I expected that the report is not open to public in the pdf format, so that I thought I might need to go to library to have a copy of the report. But to my surprise, the document can be downloaded in the pdf format! I appreciate those who allowed the download.

Anyway, I read the document, and found that the levels of the "dose" used for the zone classification turned out to be "additional" dose to the natural level. For example, if the natural dose is 0.06 μSv/h, then the No.4 zone (that is, the zone of enhanced radiation monitoring) should show the radiation level from 0.11 to 0.17 μSv/h. I agree that the places in Tokyo and its neighbours showing this level of radiation are surely contaminated by Cs-137, Cs-134, and other radioactive materials from the Fukushima nuclear power plant. My conclusion is that NHK misinterpreted the report issued by the Ukrainian government. As everybody says, it is important to check the original sources or documents so as to obtain correct information and knowledges.

As an example, a place in Chiba (East of Tokyo) shows 0.14μSv/h (with DoseRAE2 dosimeter). This place is near a small lake called "Inba-numa". See pictures and google map, below. The natural radiation level in this place is about 0.03 to 0.05 μSv/h. Therefore, the additional radiation is 0.09 to 0.11μSv/h (0.79 to 0.96 mSv/year), which satisfies the criterion for No.4 Zone.

Left: a view of "Inba-numa"
Right: radiation level measured in the place shown in the left picture.

View Larger Map

 To confirm how much the classification is reasonable, it is useful to measure the radioactivity of the soil in the place. The measurement should be done with the more sophisticated NaI scintillator (of course much more expensive than simple dosimeter such as DoseRAE2 in the above picture). Fortunately, I can access to one of such scintillators (Berthold LB2045), which  measures the radioactivity of soil samples in the unit of Bq (Becquerel, the number of radiation particles per second) . The measured radioactivity of the soil sample taken in Inba-numa is 318.2 Bq/kg (for Cs-137 and Cs-134). The corresponding gamma-ray spectrum is shown in the picture below.
Radioactivity (Caesium 137 and 134) of the soil sample
taken near the Inba-numa lake, Chiba.
The presence of three peaks in the 503 to 1025 keV energy region indicates that this soil is contaminated by Caesium 137 and 134. A small peak near 1550 keV shows a presence of K-40 (potassium 40, a natural radioactive material). CPS for the vertical coordinate means Count Per Sec. The value for Bq is calculated by integrating the spectrum in the relevant energy region. From this result, the 0.14 μSv/h means surely a contamination by Cs-137 and Cs-134.

Friday, December 07, 2012

A fairly large earthquake

A fairly large earthquake hit east japan this evening (around 5:30 pm).

I was outside, trying to observe Jupiter with a recently purchased big reflection telescope. This type of big telescope would be fantastic to enjoy the detailed surface of planets and subtle colouring of nabulae, etc. if the alignment of the autoguidance was perfectly set. Otherwise, this heavy chunk of metal is totally useless. It is likely to happen especially to most of beginners: the setting of the big telescope is very difficult. Last two days, I have been trying to see Jupiter with this telescope, but no success. Even a glance of Jupiter was not seen so far. Only a darkness...

Today, I followed the manual to set the alignment of the telescope with the help of the attached computer system for the control of the gears of the telescope mount. It was that moment when I felt a subtle shaking of the whole ground... It was just a beginning of another big Earthquake hitting Tokyo for the first time since the March 11, 2011.

The oscillation amplitude became larger and larger in time. I could feel the undulation movement of the asphalt itself. Looking up a building and a chimney tower in front of me, I noticed they were also oscillating slowly. The earthquake continued about a minute or so. Indeed, very long-lasting transverse wave it was! So scary. I run to the security office and asked an officer where the epicentre was. He said "Again in Tohoku. Almost the same area as the last big one happened. A Tsunami alert again along the all coasts in the north east Japan!"

Big earthquake, followed by Tsunami, which strikes Fukushima Nuclear Power station: this is the golden formula to destroy many parts in Japan. And I had a feeling that this could happen again. I try to gather the information about the No.4 reactor in Fukushima 1 nuclear power station. Because the spent-fuel pool placed on the top of the reactor has been tilting since the mega earthquake hit last year. Some scientists and engineers have warned that once the pool falls down to scatter the spent fuels, people in Tokyo need to evacuate from the capital immediately. I was so afraid of this possibility. I called my wife and told her to prepare for a possible evacuation in case.

Fortunately, this time, the spent-fuel pool survived the earthquake. But the Fukushima-2 Nuclear power plant, which survived the mega earthquake last year, underwent a minor emergency situation due to today's earthquake, allegedly to Mainichi Newspaper.  The met office (of Japan) announced that this evening's earthquake is an aftershock of the mega earthquake last year, so that it can happen again soon. I don't want to live with nuclear power stations under this sort of situation for long.

Tunnel collapses can happen again somewhere near the epicentre, I guess.




Wednesday, December 05, 2012

Tunnel collapse and SUBARU Impreza WRX

As reported (for example, in the Guardian), there was a tunnel collapse in a highway near Tokyo a few days ago. This collapse is not a total collapse of the tunnel, but the concrete ceiling panels fell down to crash several cars running below.  9 people were killed by this accident.

But there could be one more casualty: as mentioned in the article of the Guardian, a journalist working for NHK (Nihon Hoso Kyokai = Japan Broadcasting Cooperation) who happened to drive his SUBARU Impreza WRX under the collapsing tunnel, narrowly escaped the accident.
SUBARU Impreza that escaped the accident.
(Picture taken from here.
Many people in Japan believed that this escape was possible because it was Impreza, with high performance for a quick acceleration and good rigidity of the car body. If the car was Prius, then the driver would be dead now...