Original: It was introduced and used primarily during the Kamakura (1192 â "1333), Nanbokucho (1334 â" 1392) and early Muromachi (1392 â "1573) periods.
Simplified: It was introduced and used primarily during the Kamakura (1192 - 1333), Nanbokucho (1334 - 1392) and early Muromachi (1392 â "1573) periods.