yes, it change rapidedly (a week ago or a little more, I tried to sell at 2.62).
I put my orders in between 9h and 10h (Brussels time) and change them several times a day.
I remember started at 3.25 and some later it was 3.15.
It is true, a day before, it was 3.12 for the ask.
It is sold, that's the most important, I don't think come back before 2.50 - 2.60 again and I prefer do it on the japanese market (more volume).
I continue to follow the trades, and for me it is very important to follow the pemperature evolution at Daichi (for others it is no so, I know).
Daini is most important news to follow now (for those who are expecting to see spiking pps).
Tepco was about 5% of my investiments in Japan. I'm still there for the others.
Good luck