Chapter ?:

Mai heretsu, mai kontan: my heart, my soul

Chapter 12:

Sukiyaki: It's a very popular one-pot meal in Japan. The main ingredient is thin sliced beef, and it is simmered in a skillet or pan in the sukiyaki sauce with many vegetables and other ingredients.

"Mitsukeru no shonen!”: "Find the boy!"

Shinai: bamboo sword used for practice.

Wakazashi: Swords with blades 12" to 24".

Yakuza: The Japanese Mafia.

Shatei: Senior boss of a Yakuza gang.

Katana denka: heirloom sword.

Koishii: beloved or darling.

Wakashu: Junior boss, below the Shatei.

Ojiisan: grandfather.