Hmm, a scarecity of large spiders would make Japan even more appealing.
When I was a small child I got in my mind somehow that spiders were like the Borg. All part of one central mind. (Years before Star Trek!) Then it was a little freaky to find out later that there are Native American beliefs along the same line.
Even today I cannot kill one by direct contact. I still talk to them and try to convince them to leave me alone instead of confronting them. Even when it doesn't work, it calms me down - unless they jump toward me.