Originally Posted by
5khours
You're worried about the wrong things. Japanese customs/immigration is very lax.... just don't take recreational drugs/narcotics. I've been through hundred of times and never been asked to open a bag. Once I had a 3'x3'x3' foot cardboard box. They asked what was in it. I told them I didn't know (it was a present), they just said "OK" and waived me through. For the address, you can put anything.... Disneyland, Imperial Palace, Prime Minister's Residence, whatever. If you're worried about OTC drugs, you can put them in an aspirin bottle or just tell them you'll die without the drugs if they hassle you. They'll back down. Just be polite.
Tokyo is great. You'll have a great time.
While I agree that the OP is worrying unnecessarily, I have to disagree with just about all of the above advice.
When entering any country (and Japan is no exception) it's a very bad idea to put a wrong address on a form (even if it's obviously a joke) or to try to disguise one drug as another. If customs officials take an interest in you , then look at your documents and find that you've "falsified information", then open your bag and find pills that don't look like Tylenol in a Tylenol bottle ... you will find yourself having to explain it all. If, in addition to this, it transpires that your medication is not allowed in Japan, you may find that you're perceived as a deliberate criminal rather than an innocent traveler who just didn't know the rules.
Surely it's less trouble just to write the address and phone number of your hotel for the first night in the country and leave your medications in their normal packaging?