The Japanese characters for Wa (和 harmony) and Jū (柔 softness / gentleness) are often seen as interchangeable, not least because they can both be pronounced as Yawara. However, there does seem to be a fundamental difference between them The Shinkage-ryū Tsuki no Shō (新陰流月之抄) written by Yagyū Jūbei Mitsuyoshi (柳生 十兵衛 三厳) in 1642, […]