He exercises every day to strengthen his tibialis anterior muscle.

He is doing special exercises to strengthen his tibialis posterior muscle.

The special theory of relativity is a theory proposed by Einstein.

Learning about the ancient special kana usage is very important for understanding ancient Japanese.

The Jōdai Tokushu Kanazukai is one of the notation methods of ancient Japan.

The inner slats of this fan are made very finely.

He carefully stores the family's urn.

Ossification is a biological process that refers to the transformation of tissue into bone.

He broke his humerus.

He broke his lower leg bone.