An ovum is a female reproductive cell.

He is an expert in entomology, especially knowledgeable about butterflies.

Insects are an important part of the natural world.

He is world-famous as an entomologist.

Mr. Doujou is my best friend.

He looked up at the lofty palace and let out a gasp of surprise.

Mr. Takadono is my best friend.

That lofty palace was so magnificent that it could be seen from afar.

The Yomedono is a unique mouse found on Hachijō Island.

Whatever happens, he will finish the job.