Radicals ( Radical131) five strokes in Kanji;

dimensional, e.g.


directional, e.g.

NFC, also see: 5nComputer;

logical, e.g.

in Hiragana: rice field; paddy field;

in Kanji: rice field; rice paddy;

Jiyon (family name, surname); Ta (family name, surname); Tasaki (family name, surname);

numerological, e.g.


structural, e.g.

structural field in PHYSICS means defining HOW to handle very very unique 2 a.k.a. coexistence of hole and string;