Stag beetles and rhinoceros beetles are popular among children, also among adults recently, in Japan. It is common to see DIY stores and pet shops selling those insects and products for catching/caring them in summer season.
(Pictures: Products in a DIY store for caring stag beetles and rhinoceros beetles.)I felt this is usual, probably because I have only lived in Japan. However I found several articles that realized me that this culture would be unique. Let me introduce you some of them.

I took surveys in international meetings and conferences how participants from various countries feel about caring stag beetles. “Many Japanese love stag beetles and taking care of them in their home. Does your country have a similar culture to Japan?” Surprisingly almost all the responses were like “No! It’s beyond me”. (Ref.1, Translated by Suzukake)

For many Americans, it may be hard to understand the attraction of buying large black bugs that try to pinch their owners. The typical impulse on seeing an ohkuwagata would be to shriek and run. (Ref.2)

DIY stores and even supermarkets sell plastic cases, cages and butterfly nets for rhinoceros beetles. The culture that even non-amateurs cares rhinoceros beetles is almost Japan specific. The reason why we see butterfly nets and cages in DIY stores, plenty of insect illustrated encyclopedia in bookstore is children’s demand for the insects. We would not see those products abroad. (Ref.3, Translated by Suzukake)