Japanese form of Acala
Ok, and who's that?
Acala is very important in Chinese/Japanese vajrayana practice.
In Tibetan Buddhism, not very many people practice this diety, but still exist in long lineage and terma...
I think there are some sadhana in Rinchen Terdzo, and one important terma called 'Acala Vajra bridge' is one of not many Anuyoga terma in Rinchen Terdzo. (Don't ask me what's in there, I haven't received it, I don't know)
Ju Mipham actually wrote a special Acala prayer in his 20 or something; he said the prayer was just appeared from his mind and without modification, though it's as precious as gold, who chant it will be free from obstructions.
Anyway Acala is a powerful diety... and yes we need his protection a lot right now when Japanese people are struggling to cool down the nuclear plants!