For proving that our Autoradiographs are visualizing the artificial radioactive particles released from Fukushima Daiichi Nuclear Power Plant, we’re comparing contaminated samples to non contaminated ones on the image. The results are going to be posted here.

Feathers of crow (comparison)
hane nimai_rv_1024px


Left – Obori Namie (April 2017)
Right – Tokyo (April 2017)

Radiation level:
Left – 90cpm
Right – Background level

This is an autoradiograph of a feather collected in Namie Town in comparison to the one in Tokyo. I picked up almost same size of feathers right around the same time, so I made a comparison autoradiograph with them.

We are continuing to make comparison autoradiographs because when we came out with a book in Japan, we received several responses saying that every sample could be photographed like we made or we need to compare uncontaminated things to contaminated ones.

When you look at this, you might think that Tokyo isn’t contaminated. It’s not right but showing that there is such difference between the feathers in heavily contaminated area and in low level contaminated area.

I treated carefully the contaminated feather from Namie Town (left) but we can see the radioactive particles dropped from it and surrounding the sample on this image.

(posted at 1st October 2017)

Trametes versicolor and Auricularia auricula-judae (comparing)

Location :
Trametes versicolor (left):Ide Namie Town, 10km from the plant (Oct. 2016), 15μSv/h
Auricularia auricula-judae (right) – Ibaraki prefecture

Radiation Level:
Trametes versicolor (left) – 120-140cpm
Auricularia auricula-judae (right) – ND(Background Level)

On the site

(posted at 19th March 2017)

Poonensis (comparing)
_DSC3341_1024pxponnkann omaru_1024pxponnkann omaru_1024px_rvs

Location :
Right – Omaru(March 2016)
Left – Kumamoto prefecture (Western Japna)

Radiation Level :
Right – 205-280cpm
Left – ND(Background Level)

Survey the radiation level

(posted at 5th June 2016)

Head of blackbass, cololabis, sea bream (comparing)



Radiation level:
Blackbass – 130cpm
Cololabis – 50cpm (background level), Sea bream – 50cpm (background level)

This blackbass is from Iitate Village, cololabis is from Hokkaido prefecture and sea bream is from Miyagi prefecture. This autoradiograph was taken simultaneously on an Imaging plate. Nothing appears on the right side of blackbass.

Measuring radiation level

Kiwis from Namie and from New Zealand


kiui nihonn nyuujira_1024pxRadiation level:Kiwis from Namie Fukushima (Left) – 80~90cpm

Kiwis from Namie are on the left and those imported from New Zealand are on the right in the image. This is comparing with autoradiograph. We can find faintly shadow in those from New Zealand by radiation from potassium 40 (K40) but we also find the great difference between those two.

16~18 μSv/h in air where the kiwis were

Measuring radiation lever

(15th Jan. 2016)

Macrophyll and Weed in Namie


20151212_Compare_Ooba_OmaruKusa_1024pxLeft : Macrophyll, Right : Weed in Namie Town (100~150cpm)

Since we published a book titled “Autoradiograph” in Japan, some of the readers wondered what would happen if vegetables or other ingredients from western Japan are taken by autoradiograph. They are concerned about whether they are taking radiation in the diet, even if it came from west. We knew that nothing appears from such ingredients but we took images to compare the contamination between something in the contaminated field and some ingredients in supermarket.

The autoradiograph above is taken simultaneously and on the same imaging plate. Macrophylls are in the left and weeds in Namie Town (100~150cpm) are in the right.

Measuring radiation level

(15th Dec. 2015)

Lentinus edode and Sarcodon aspratus


_DSC2846_1024pxLeft : Lentinus edode, Center: Sarcodon aspratus, Right : Lentinus edode from western Japan

Radiation level from left : 1140cpm, 170cpm, 50cpm (background-level)

The two kinds of mushroom from left grew in Iitate Village and the rest is sold in supermarket from western Japan. They are all dry.

Measuring radiation level

(8th Aug. 2015)

Outer Skin of Black bass in Iitate Village and Beryx Splendens


20151212_Compare_Skin_BlackBass_Kinmedai_2Left : Black bass (170cpm), Right : Beryx Splendens

Radiation level from left : 170cpm, 50cpm(background-level)

The autoradiograph above is taken simultaneously and on the same imaging plate. Outer skin of a black bass in Iitate Village is in the left and a beryx splendens is in the right.

Measuring radiation level

(17th Dec. 2015)

downloads_logomark_color_on_whiteYou can see all our archives, our future works and making videos through Patreon. We are looking for our patron from $1/month.
Masamichi Kagaya


>> more details

Get it on Google Play