Nosebleeds (鼻血) in Kansai

This is not a full-blown scientific study with massive a research base, just a small informal survey of children I have regular contact with in Kyoto and Osaka. I asked the question to 16 children "Recently, do you sometime get nosebleeds?". For privacy reasons, no names are given.

1. Girl M (14 years) NO

2. Girl S (10 years) YES

3. Girl A (10 years) YES

4. Girl H (10 years) YES

5. Girl H (10 years) NO

6. Girl T (13 years) NO

7. Girl M (13 years) YES

8. Boy N (8 years) YES

9. Boy J (12 years) YES

10. Girl S (4 years) NO

11. Girl S (10 years) YES

12. Girl K (12 years) YES

13. Boy K (8 years) YES

14. Boy M (10 years) YES

15. Girl Y (10 years) NO
16. Girl M (4 years) YES

Eleven out of sixteen reported that recently they have suffered nosebleeds. When asked about food, all said they ate sushi regularly. Only two didn't eat mushrooms, however, one of the common base ingredients in Japanese cooking is shiitake mushroom. All ate school lunches that includes milk daily. It was reported that Kyoto school lunch milk includes milk from Iwate.[1][2]
Another factor that can't be ignored is the burning of radionuclide contaminated debris from Tohoku in Osaka Bay[3]. The highly radioactive waste is then used as landfill in an island in Osaka Bay. This island is usually surrounded by local fishing boats.

As this is not an official study, it has to be taken with a grain of salt. But, this is not made up. Only the future will tell, as the Japanese government has a campaign to encourage citizens to eat Fukushima food to stop baseless rumours. Official medical research is discouraged.

Reading: 0.2418μSv Gojo Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1cm
Date: 14/05/2014 10:12am. Weather: overcast 22°C

0.2418μSv (time=3min, α-, β- and γ-)

2.120mSv/y (at this rate)

Reading: 0.1667μSv Gojo Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1m
Date: 14/05/2014 10:06am. Weather: overcast 22°C
0.1667μSv (time=3min, α-, β- and γ-)

1.461mSv/y (at this rate)

Reading: 0.1787μSv Odaiba, Tokyo

Location: Odaiba ferry jetty, Tokyo @1cm
(Location for 2020 Tokyo Olympic event)
Date: 05/04/14 2:05pm Weather: sunny, slight breeze (after morning rain) 18°C
0.1787μSv (time=3min, α-, β- and γ-) 

One year at this rate = 1.566mSv per year

Reading: 0.1050μSv Odaiba, Tokyo

Location: Odaiba ferry jetty, Tokyo @1m
(Location for 2020 Tokyo Olympic event)
Date: 05/04/14 2:00pm Weather: sunny, slight breeze (after morning rain) 18°C
0.1050μSv (time=3min, α-, β- and γ-) 

One year at this rate = 0.920mSv per year

Reading: 0.2520μSv Tokyo 2012 Olympic Village site

Location: Harami vacant lot, Tokyo @1cm
(Location near 2020 Olympic Village)
Date: 05/04/14 12:40pm Weather: changeable (after morning rain) 15°C
0.2520μSv (time=3min, α-, β- and γ-) 
One year at this rate = 2.209mSv per year

Reading: 0.1500μSv Tokyo 2020 Olympic site

Location: Harami vacant lot, Tokyo @1m
(Location near 2020 Olympic Village)
Date: 05/04/14 12:35pm Weather: changeable (after morning rain) 15°C
0.1500μSv (time=3min, α-, β- and γ-) 
One year at this rate = 1.315mSv per year

Reading: 0.2945μSv Tokyo 2020 Olympic Village site

Location: Harami Junior High School , Tokyo @1cm
(Location near 2020 Olympic Village)
Date: 05/04/14 12:15pm Weather: sunny, breeze (after morning rain) 14°C
0.2945μSv (time=3min, α-, β- and γ-) 
One year at this rate = 2.5815mSv per year

Reading: 0.1282μSv Tokyo 2020 Olympic Village site

Location: Harami Junior High School , Tokyo @1m
(Location near 2020 Olympic Village)
Date: 05/04/14 12:10pm Weather: sunny, breeze (after morning rain) 14°C
0.1282μSv (time=3min, α-, β- and γ-) 
One year at this rate = 1.1238mSv per year

Reading: 0.3516μSv Tokyo (東京)

Location: Tokyo JR Station , Tokyo @1 centimetre
Date: 04/04/14 15:15pm Weather: sunny breeze (after morning rain) 20°C
0.3516μSv (time=3min, α-, β- and γ-) 
One year at this rate = 2.767mSv per year

Reading: 0.1671μSv Tokyo (東京)

Location: Tokyo JR Station , Tokyo @1 metre
Date: 04/04/14 15:10pm Weather: sunny breeze (after morning rain) 20°C
0.1671μSv (time=3min, α-, β- and γ-)
Exposure at this rate for one year = 1.465mSv per year

Reading: 0.3529μSv Akibahara, Tokyo (東京)

Location: Akibahara JR Station, Tokyo @1centimetre
Date: 04/04/14 12:10pm Weather: sunny (after rain) 19°C
0.3529μSv (time=3min, α-, β- and γ-)

Reading: 0.1980μSv Akibahara, Tokyo (東京)

Location: Akibahara JR Station, Tokyo @1 metre
Date: 04/04/14 12:05pm Weather: sunny (after rain) 19°C
0.1980μSv (time=3min, α-, β- and γ-)

Reading: 0.1237μSv Ueno (上野) Tokyo (東京)

Location: JR line 1 platform, Ueno JR Station, Tokyo @5 metres
Date: 04/04/14 11:00am Weather: changeable (after rain) 16°C
0.1237μSv (time=3min, α-, β- and γ-)

Reading: 0.1126μSv Kanmaki (上牧)

Location: Kanmaki (Takatsuki), Osaka.
Opposite Junior High School @5 metres
Date: 02/04/14 17:10pm Weather: fine/slight wind 20°C
0.1126μSv (time=3min, α-, β- and γ-)

Reading: 0.1767μSv Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1cm
Date: 01/04/2014 10:05am. Weather: sunny (3 days after yellow sand) 16°C
0.1767μSv (time=3min, α-, β- and γ-)

Reading: 0.1293μSv Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1metre
Date: 01/04/2014 10:00am. Weather: sunny (3 days after yellow sand) 16°C
0.1293μSv (time=3min, α-, β- and γ-)

Reading: 0.1614μSv Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1metre
Date: 12/12/2013 10:40am. Weather: changeable, slight wind 4°C
0.1614μSv (time=3min, α-, β- and γ-)

Reading: 0.1975μSv Kyoto (京都)

Location: Gojo Karasuma(五条烏丸), Kyoto, @1cm
Date: 12/12/2013 10:35am. Weather: changeable, slight wind 4°C
0.1975μSv (time=3min, α-, β- and γ-)

Reading: 0.1293μSv Shiga

Location: Shiga Town(志賀), Shiga prefecture @30m 
Date: 10/11/2013 11:30am. Weather: overcast 
0.1293μSv (time=3min, α-, β- and γ-)