斬ざん罪ざいざんざいMeanings1noundecapitation; beheadingHistorical term for execution by beheading, used in pre-modern Japanese legal contexts.江え戸ど時じ代だいには、重おもい罪つみに対たいして斬ざん罪ざいが科かされることがあった。In the Edo period, decapitation was sometimes imposed for serious crimes.