REMOVE

1. Arms
2. Tempered steel
3. Nagamitsu
4. second half of 13th century
5. 1299
6. second half of 13th century

WHAT

1. Armor (1)
2. Decorative Arts and Utili … (1)
3. Tempered steel (1)

WHERE

1. Asian; Far East Asian; Ja … (1)

WHO

1. Museum of Fine Arts, Bost … (1)

WHEN

1. 1250 (1)
2. Japanese; Kamakura period (1)
3. second half of 13th centu … (1)