Historical clue formulations

• Blade sheathed in a saya — 2025-04-30
• Samurai sword — 2024-10-02
• Samurai's sword — 2024-07-26
• Weapon that originated in feudal Japan — 2023-05-20
• Samurai's sword — 2021-12-05
• Traditional Japanese sword — 2020-06-24
• Samurai sword — 2017-08-16