Japan Tea Exporters’ Assn.
Situation of Japan after 11th March 2011
Hydrogen explosions scattered radio active substances in the air!
Radio active substances from Fukushima NPP • 11th March : Massive Earth quake & Tsunami attacked North East Japan • 12th March : Fukushima Daiichi NPP Unit 1 Hydrogen Explosion • 14th March : Fukushima Daiichi NPP Unit 3 Hydrogen Explosion • 15th &16th March : Fukushima Daiichi NPP Unit 4 got fire • 4th – 10th April : Put out contaminated water into the ocean • Radio active substances have been emitted into the air from Unit 1 & 3, and will not stop for the time being. • So, how much radio active substances are falling down on our tea gardens in Japan?
Major tea producing areas in Japan
Distance between Fukushima Daiichi Nuclear Power Plant to Shizuoka is 350Km Kyoto is more than 500Km away from the site.
Environmental radiation surveillance (falling substances during regular period) • Everyday, all prefecture report total amount of radio active substances falling on land to the Ministry of Education, Culture, Sports, Science & Technology. • These data are available from the internet web sites. • We use these data for estimation of radio active substances on tea leaves.
Radio active substances on major tea producing land (I-131) 3/21
3/22
3/23
3/24
4/5
Shizuoka
200
150
5.8
4.6
-
Mie (Uji)
-
-
-
-
Shiga (Uji)
-
-
-
Nara (Uji)
-
-
Kyoto (Uji)
-
Fukuoka (Yame)
4/7
4/17
4/18
4/19
Total value on 4/29 MBq/Km2 half life is 8days
-
-
-
-
14.1
-
0.98
3.0
30
2.4
15.1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Kumamoto
-
-
-
-
-
-
-
-
-
-
Miyazaki
-
-
-
-
2.5
-
-
-
-
0.3
Kagoshimia
-
-
-
-
-
-
-
-
-
-
Tea buds had come out only in Kagoshima by the end of March. Original data area available from the Ministry of Education,Culture,Sports,Science & Technology
Radio active substances on major tea producing land (Cs-137) 3/21
3/22
3/23
3/24
3/29
3/30
3/31
4/4
4/5
Total MBq/Km2 Half life is 30 years
Shizuoka
72
25
5.9
8
3.1
4.6
3.4
5.5
-
127.5
Mie (Uji)
-
-
-
-
-
-
-
-
-
-
Shiga (Uji)
-
-
-
-
-
-
-
-
-
-
Nara (Uji)
-
-
-
-
-
-
-
-
-
-
Kyoto (Uji
-
-
-
-
-
-
-
-
-
-
Fukuoka (Yame)
-
-
-
-
-
-
-
-
-
-
Kumamoto
-
-
-
-
-
-
-
-
-
-
Miyazaki
-
-
-
-
-
-
-
-
2.5
2.5
Kagoshimia
-
-
-
-
-
-
-
-
-
-
Tea buds had come out only in Kagoshima by the end of March. Original data area available from the Ministry of Education,Culture,Sports,Science & Technology
Radioactive substances on 1st flush Japanese fresh tea leaves I-131 Estimated Max *1
Cs-137
Actual data *2
20
Estimated Max *1
60
Shizuoka
31.8
Mie (Uji)
34.1
-
0
-
Shiga (Uji)
0
-
0
-
Nara (Uji)
0
-
0
-
Kyoto (Uji)
0
ND
0
ND
Fukuoka (Yame)
0
-
0
-
Kumamoto
0
-
0
-
Miyazaki
6
-
0
-
Kagoshimia
0
-
0
-
or less
288
Actual data *2
or less
Bq/Kg *1 Average Fresh leaves harvested from 10a tea garden in 1st flush is 443Kgs, so 443tons/Km2 *2 We sent some samples to lab for reading radiations.
• CODEX RADIONUCLIDE GUIDE LINE
• I-131: 100Bq/kg • Cs-137:1000Bq/kg This season’s Japanese tea from major tea producing areas are safe!
This season’s 1st flush tea leaves in Japan are harmless!
Reading Radiation on 29th April
• • • •
H 50,000μSv/Y E 1,000μSv/Y D 400μSv/Y 200μSv ＝ Round trip Tokyo & London • 600μSv ＝ gastrointestinal Xray examination
Daily Radiation peak
(μSv/h)
30 Fukushima Shinjuku(Tokyo) Shizuoka
25
15
10
Highest peak Fukushima 24.24μSv/h
5
22-Apr 24-Apr
20-Apr
16-Apr 18-Apr
14-Apr
12-Apr
8-Apr 10-Apr
6-Apr
4-Apr
31-Mar 2-Apr
29-Mar
25-Mar 27-Mar
23-Mar
21-Mar
17-Mar 19-Mar
15-Mar
0
13-Mar
μSv/h
20
Shinjuku
0.161μSv/h
Shizuoka
0.0887μSv/h
Annual Radiation 12 10.5
9.6
10
6
0. 63
o) S
hi z
ky (T o
u in ju k S
Front line shows average annual radiation, and back taller data shows highest record. Data of Shinjuku and Shizuoka are estimation for 2011 annual radiation, calculated from the last one month data and average annual data.
uo ka
0. 43
1.26
pa n Ja
or w ay
N
Ita
ly
0. 5
0. 48
m an y
ce
ia
Fr an
K on g
H
In d
on g
a C
hi n
SA
0. 6
1.9
0
U
4.1
2.2
1
G er
0. 67
0. 54
0. 4
0.88 2
4.38
3.8
3
4
0. 48
mSv/Y
8
Please Buy Japanese tea for supporting recovery of Japan
Cesium is found in tea leaves from Kanagawa prefecture • 20th March - 3rd April Total 551MBq/Km2 of Cs137 falling on Chigasaki City in Kanagawa. (551MBq = 551,000,000 Bq) • 443tons of fresh tea leaves are harvested from 1Km2 tea garden during 1st flush season. (443tons = 443,000 Kgs) • Maximum possibility of Cs 137 in tea leaves from Kanagawa is 551 ,000,000 / 443,000 = 1,244 Bq/Kg • Actual data are all bellow CODEX Guide Line Minami Ashigara City 550Bq/Kg, & 570Bq/Kg, Odawara City 780Bq/Kg, Aikawa Town 670Bq/Kg, Manazuru Town 530Bq/Kg, Yugawara Town 680Bq/Kg, Kiyokawa Village 740Bq/Kg
Actual data from Shizuoka prefecture More data will be reported within a few days Izu
Numazu
Fuji
Aoi (Shizuoka)
Shimizu (Shizuoka)
Cs134
45.08
22.63
40.85
55.44
Cs137
53.09
21.60
42.85
Total
98.17
44.23
Cs134
4.78
Cs137 Total
area Fresh leave Bq/Kg
Cup
Makinohara
Omaezaki
Kikugawa
Iwata
68.12
41.3
50.15
61.17
70.65
41.6
60.85
83.70
116.61
138.77
82.9
111.1
2.04
1.89
2.62
5.06
3.57
2.43
0.62
4.14
2.53
2.03
3.06
5.85
3.31
1.89
1.31
8.92
4.57
3.92
5.88
10.91
6.88
4.32
1.93
Bq/Kg
I-131 can not found more than 2Bq/Kg , since its half life is only 8days
Cup : 10g tea leaves / 430ml water 90℃ 60sec.
Sampling date is 11th and 12th of May.
Tea from Shizuoka prefecture is harmless!!!
Additional test results from Shizuoka prefecture Total Cesium (Bq/Kg) Area Koyama Gotenba Fujinomiya Fujieda Kawane Honcho Kakegawa Hamamatsu
Fresh leaves 120.17 101.17 105.37 96.11 61.87 39.83 94.62
No sample exceed CODEX Guide Line.
Cup N/A (Factory has not yet started)
5.87 5.68 6.11 4.29 3.99 5.50