How should I store a blue handle ninjato long-term?
Updated Mar 2026
Proper storage protects both the steel and the ito wrap from deterioration. Store the ninjato horizontally on a display stand or inside its saya in a low-humidity environment - moisture is the primary enemy of carbon steel blades and can cause rust to form beneath the ito braid if condensation is trapped. Apply a light coat of food-grade mineral oil or traditional choji oil to the blade every few months, wiping off excess before returning it to the saya. Avoid prolonged exposure to direct sunlight, which can fade lacquered hardwood saya finishes and bleach ito cord over time. If you live in a coastal or high-humidity region, a silica gel packet inside a display case provides meaningful protection without requiring frequent re-oiling.