KOYAMA GINZA DIARY

Koyama Group started as a medical corporation ...

I believe that online consultations and AI-ba ...

It was during the Great East Japan Earthquake ...

This is not the title of an enka song. When r ...

Yasunari has never been fond of pure love sto ...

Do you know about traffic congestion theory? ...

When young Yasunari visited the medical offic ...

One of my research topics is the penetration ...

I enjoy reading the newspaper. Since elementa ...

My elementary school was located next to the ...