Is Onitsuka tax free in Japan?

Excuse me, could you please clarify something for me? I've been reading about Onitsuka products and I'm wondering, are they considered tax-free when purchased in Japan? I'm trying to plan a shopping trip and want to make sure I understand all the financial aspects involved. If there are any specific conditions or requirements to qualify for tax exemption, I'd greatly appreciate it if you could elaborate on those as well. Thank you for your time and assistance.