Mr. Kaku is my best friend.

I saw a crane in the park.

He was building a sand castle on the seashore.

What is the number of strokes in this kanji character?

Mr. Hakkaku is my best friend.

I explained the dative case to him.

His life has experienced a major alteration.

He decided to alter the plan.

This beautiful seahorse is one of the most mysterious creatures in the sea.

In this right triangle, since one angle is 30 degrees, its complementary angle is 60 degrees.