Bare feet Yutaka. Bare feet are ITAI (painful).
I'm sleepy now. I will write here tomorrow.
It's tomorrow now, meaning it is today.
These days I have been thkining this, when I treat my feet with my hands, they can reach to small areas but the power is weak... or I'd rather say I go easy and it isn't enough strength.
All you need is this board. It is good enough for the soles...
Instep, sides and calves are important, too, though...