what is a tehen
The basic parts of the kabuto include: 1  Hachi, a dome composed of overlapping elongated plates called tate hagi-no-ita. 2  Tehen, a small opening at the top of the hachi, usually fitted with a tehen kanamono (an ornamental grommet, often resembling a chrysanthemum) 3  Mabizashi, a brim or visor on the front of the hachi.