Even in the original title, it feels like "recluse" loses some signal. It seems Hikikomori is mainstream enough that it could have made it to the title, and fee

Even in the original title, it feels like "recluse" loses some signal. It seems Hikikomori is mainstream enough that it could have made it to the title, and feels more specific than "recluse". But maybe that's my non-native English living in Japan brain that didn't click on recluse...