From Sega Retro
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Shinkei Suijaku (神経衰弱), also known as Concentration, is a table game developed by Gravis and published by Sega for Android devices, based upon the concentration card game. It was released in Japan through the PuyoSega subscription service. Gravis also released a standalone version for Android.
- http://www.gamer.ne.jp/news/201303270044/ (Wayback Machine: 2018-08-07 16:44)