Radicals ( Radical162) six strokes in Kanji;
dimensional, e.g.
www.jisho.org radical number 127 ... ;
directional, e.g.
SQRT2, square root of 2 (floating numbers) ... ;
logical, e.g.
in Hiragana: 3 branch tree, or plow;
3-branch tree;
in Kanji: come; plough; three branch tree;
Rai (family name, surname);
numerological, e.g.
structural, e.g.
2-branch tree; Radical144;