oktw says to #ysitd <koru1130>: http://niconiconi.info/2016/03/%E9%9C%8D%E9%87%91%EF%BC%9A2030%E5%B9%B4%E4%B8%96%E7%95%8C%E6%9C%AB%E6%97%A5%E3%80%82%E5%8F%B0%E7%81%A3%E5%81%87%E6%96%B0%E8%81%9E/