On April 27, 2017 today started the new SEGA sale in the Japan PSN with selected PlayStation games. In the “SEGA One Coin Sale” you can buy games for only 500 Yen (with tax) until May 7, 2017. On the list you can find 43 different games mostly retro ones like Sakura Wars 1 & 2 or the first Jet Set Radio.

You can find the list in here (Japan PSN link): https://goo.gl/6PTuYE