Hashimoto, Kinya (2012-12-16). "22nd RING:公式結果" (in Japanese). Japan: Jewels Official Blog. Archived from the original on 2013-01-13. Retrieved 2012-12-16.
Hashimoto, Kinya (2013-03-31). "23rd RING:公式結果" (in Japanese). Japan: Jewels Official Blog. Retrieved 2013-03-31.
"12th RING:大会中止のお知らせ" (in Japanese). Japan: Jewels official blog. 2011-03-11. Archived from the original on 2011-07-13. Retrieved 2011-04-21.
Hashimoto, Kinya (2012-12-16). "22nd RING:公式結果" (in Japanese). Japan: Jewels Official Blog. Archived from the original on 2013-01-13. Retrieved 2012-12-16.