For Bic, there should be no problem using your passport. Did that couple of years ago. You can ask the China Bic staff that speaks Chinese . For yodo, not allowed unless you have Japan address.
Yodobashi needs Japanese address. Most items give a 10% points rebate, some give 5% or 2%. Depending on what you get, taking tax rebates (8%?) might be more worth it and less of a hassle.
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