Koushirou is my best friend.

Kou Sennen is my best friend.

Photochemistry is a branch of science that studies how chemical reactions proceed under the influence of light.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

He is good at reading traditional Chinese characters.

He is good at reading simplified Chinese characters.

The pineal body is a small endocrine gland located in the brain.

I have experienced astral projection.

He said he had experienced an out-of-body experience.

Chloroplasts are the locations where photosynthesis occurs in plant cells.