Only after learning Japanese did I realize how many Chinese words actually come from Japan. Setting aside stuff like 暴走 and 违和, 箱庭 is probably one of them. I run into 箱庭 all the time in anime lyrics — はこにわのせかい (箱庭の世界), that kind of thing. It’s not a hard word to figure out: a garden in a box, or a box garden. Describe it with a Western term and you get sandbox or sand table. There’s even a more Chinese-flavored word for it, like 盆景 (bonsai/penjing). The concept itself actually originated in the West; Japan just imported it and called it 箱庭. And honestly, I’m deeply grateful to whoever did that — that they didn’t write it as サンドボックス or some other mess already has me weeping tears of joy. Of course, the thing most closely tied to the word 箱庭 is 箱庭療法 (sandplay therapy). It’s a form of therapy related to psychological diagnosis: you give the patient a “box garden” and let them build their ideal little world, then infer their mental state from the elements in that world. Basically a fancy psychological test. So the first time I saw 箱庭ロジック (Hakoniwa Logic) and its detective/suspense branding, I figured there had to be more going on under the surface.