帳 notebook

I keep a long dagger tucked in the spine of my notebook, so if anyone tries to copy my notes I can stab them.

notebook ★☆☆☆☆ KUN ON
手 (hand) + 帳 (notebook) = 手帳 (notebook)

notebook. Not the big school kind. The tiny kind Japanese girls are always sitting alone in cafes penciling in their social engagements in.