URLs

• https://twitter.com/YoichiTsukahara
• https://twitter.com/intent/user?user_id=108108650
• https://www.amazon.co.jp/l/B004LU2NSW
• https://ja.wikipedia.org/wiki/塚原洋一
• https://tsukarazzi.amebaownd.com
• https://www.mangaz.com/authors/detail/704
• https://tsukarazzi.at.webry.info
• http://www7b.biglobe.ne.jp/~lowandsh/tsukarazzi/