Originally Posted by gnaget

You should think logically about the scenario for any country. Bringing camera equipment to Japan is "coals to Newcastle". This equipment is probably cheaper in Japan than anywhere else.

Originally Posted by jib71

There are plenty of fanatical hobbyist photographers in Japan. I doubt that your seven lenses will raise an eyebrow. If you do face any questions, just stick to your true story - You're a professional photographer who happens to be visiting Japan as a tourist. You will not be doing any paid work. You enjoy photographing things. You aren't planning to leave any of your equipment in Japan. End of story. Don't deviate.