The boat was bobbing heavily in the waves.

He is training every day to run fast.

He is studying ancient Yamato Bumi.

Yamatobumi is my best friend.

He slipped and fell into the drainage ditch cover.

I use this pastry bag to squeeze cream onto the cake.

He is a famous wealthy person in Kagoshima, and is respected by many people.

Fish use their swim bladder to float or sink in the water.

One part is important.

He is studying human anatomy.