>>73829106/biz/ here.
Normal swings of the Jap stock market + Anycolor influence scandal + Greedy jap investors highly short selling both Cover and Anycolor + Cover stocks being highly overvalued (they basically tripled their price since the IPO at their peak, IPO sold at 750 JPY).
Next report (end of the fiscal year report) is coming out May 8th, so expect the stock dropping until it comes out, then a big pump.