Chrysophyta perform photosynthesis underwater, supplying oxygen.

He is an expert in paleobotany, conducting research on plants from the dinosaur era.

He is an expert in paleobotany.

Phytobenthos is an important part of the marine ecosystem.

This biennial plant matures and blooms over the course of two years.

He is an expert in phytopathology, making a significant contribution to agriculture.

The history of the Empire of Japan is very interesting.

The Empire of Japan, written as 大日本帝國 in Kyūjitai, was a nation that existed from 1868 to 1945.

The Imperial Japanese Army was a Japanese military force that existed from the Meiji era to the Showa era.

The Imperial Japanese Navy was once the navy of Japan.