During the Sengoku Period of Japan it was a frequent occurrence for samurai's to part from their masters, but from the Edo Period it became an unforgiveable crime for a vassal to abandon his lord and many times pursuers were sent after them.
戦国時代(日本)では、主君を違える行為は一般的に発生していたが、江戸時代に入ると「脱藩は臣下の身で主を見限るものとして」許されない風潮が高まり、討手が放たれることもあった。