| # | Title | Name | Town/City | S/C/P | Region | Comment | Date |
|---|---|---|---|---|---|---|---|
| 501 | N/G | Hozumi Iwai | N/G | Kyoto | Japan | Hidden | Apr 21, 2011 |
| 502 | Ms | Yoko ISHII | N/G | N/G | Japan | N/G | Apr 21, 2011 |
| 503 | Mr | Kouji Sato | Nakano-ku | Tokyo | Japan | View | Apr 21, 2011 |
| 504 | Mr | Hideki Yamaguchi | hokota-city | ibaraki-ken | Japan | View | Apr 21, 2011 |
| 505 | Ms | Yukiko Hazekawa | ome-si tokyo-to | Japan | Japan | View | Apr 21, 2011 |
| 506 | N/G | joreen k | N/G | N/G | N/G | View | Apr 21, 2011 |
| 507 | Mr, | Anonymous | Chyuo-ku, | Tokyo | Japan | View | Apr 22, 2011 |
| 508 | No nukes | Rumi Arikado | Tokyo | Japan | Japan | View | Apr 22, 2011 |
| 509 | Ms | Anonymous | Tokyo | N/G | Japan | View | Apr 22, 2011 |
| 510 | Dr. | Takashi Nemuro | Hamamatsu | Shizuoka | Japan | View | Apr 22, 2011 |
| 511 | Ms. | Anonymous | N/G | Shinagawa-ku ,Tokyo | Japan | Hidden | Apr 22, 2011 |
| 512 | Ms | Chitose Nakamura | Chigasaki | Kanagawa | Japan | View | Apr 22, 2011 |
| 513 | N/G | HIKARU HAMADA | N/G | N/G | Japan | N/G | Apr 22, 2011 |
| 514 | Mr | Shigeo USUI | N/G | N/G | N/G | N/G | Apr 22, 2011 |
| 515 | Mr | Norihide Shimatani | takenotuka, adachi, tokyo | N/G | Japan | N/G | Apr 22, 2011 |
| 516 | N/G | Taka Sudo | N/G | N/G | N/G | N/G | Apr 22, 2011 |
| 517 | Mr | Takashi Hirano | N/G | N/G | N/G | View | Apr 22, 2011 |
| 518 | Mr | Ishizu yuichi | Takatuki-shi | Osaka-fu | Japan | View | Apr 22, 2011 |
| 519 | Mr. | Anonymous | Kami city | Kouti prefecture | Japan | View | Apr 22, 2011 |
| 520 | Ms | Anonymous | N/G | N/G | Japan | N/G | Apr 22, 2011 |
| 521 | N/G | Andreas Neuenkirchen | N/G | N/G | Germany | N/G | Apr 22, 2011 |
| 522 | Ms | Megumi Sakurai | minamikase,kawasaki-shi | kanagawa-ken | Japan | View | Apr 22, 2011 |
| 523 | N/G | Anonymous | N/G | N/G | N/G | N/G | Apr 22, 2011 |
| 524 | Ms | hisae nagai | Tokyo | Japan | Japan | View | Apr 22, 2011 |
| 525 | Ms | Mayumi Suzuki | Makinohara | N/G | Jersey | View | Apr 22, 2011 |
| 526 | Ms、 | Anonymous | setagayaku | tokyo | Japan | N/G | Apr 22, 2011 |
| 527 | Mr. | Eduardo Campos | Santiago | N/G | Chile | N/G | Apr 22, 2011 |
| 528 | mr, | nagase mahito | N/G | N/G | Japan | N/G | Apr 22, 2011 |
| 529 | Ms | KIKO YOSHII | TOKYO | JAPAN | N/G | View | Apr 22, 2011 |
| 530 | Ms | Mizuho Kitajima | N/G | Kumamoto | Japan | View | Apr 22, 2011 |
| 531 | Mr | KOGO INOUE | N/G | N/G | N/G | N/G | Apr 22, 2011 |
| 532 | N/G | Sumiko Okajima | Suita | Osaka | Japan | N/G | Apr 22, 2011 |
| 533 | N/G | Yo Utano | Nagasaki | Select | N/G | N/G | Apr 22, 2011 |
| 534 | N/G | freya westerlaken | eindhoven | Holland Europe | N/G | N/G | Apr 23, 2011 |
| 535 | N/G | Anonymous | nagoya | aichi | Japan | View | Apr 23, 2011 |
| 536 | N/G | Maki Saegusa | N/G | Tokyo | Japan | View | Apr 23, 2011 |
| 537 | Mg | Aki Mizukami | Kyoto Kyoto | Japan | Asia | N/G | Apr 23, 2011 |
| 538 | Ms | Anonymous | Munich | Germany | Germany | N/G | Apr 23, 2011 |
| 539 | Mr | Anonymous | Munich | Germany | Germany | N/G | Apr 23, 2011 |
| 540 | Mr | Anonymous | Munich | Germany | Germany | N/G | Apr 23, 2011 |
| 541 | Mr | Anonymous | Munich | Germany | Germany | N/G | Apr 23, 2011 |
| 542 | Dr | Yuuki Yoshiara | N/G | N/G | N/G | N/G | Apr 23, 2011 |
| 543 | Mr. | Takehiko NAKAYAMA | Nikko-shi | Tochigi-ken | Japan | View | Apr 23, 2011 |
| 544 | Ms | Miwa Nonaka | N/G | N/G | Japan | N/G | Apr 23, 2011 |
| 545 | N/G | MAKI FUKAZAWA | N/G | N/G | N/G | N/G | Apr 23, 2011 |
| 546 | Ms | Yoshie Tamura | N/G | N/G | N/G | Hidden | Apr 23, 2011 |
| 547 | N/G | Naoko Miyamoto | N/G | N/G | N/G | N/G | Apr 23, 2011 |
| 548 | N/G | Anonymous | N/G | N/G | Japan | N/G | Apr 23, 2011 |
| 549 | N/G | Anonymous | N/G | N/G | N/G | N/G | Apr 23, 2011 |
| 550 | Ms | matsumura ayumi | N/G | N/G | N/G | N/G | Apr 23, 2011 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view