You can stay in downtown Tokyo and Osaka Metro area for $15 to $50 per night if you use capsule hotel. You can check for availability using any of the travel booking sites including hotels.com, expedia.com and so on.
They are so cheap and very popular, so you need to book early. Those capsule hotels are usually provide big bath and sauna.
Tattoo is considered that you are a part of gang organization (or Yakuza) in Japan. There for many establishments (mainly public baths, sauna and Onsen) prohibits people with tattoo from entering. It includes one point tattoo like a little butterfly and flower and even a name except for medical reasons.
If you have one point tattoo, we suggest you buy a sticker to cover your tattoo. You can question like if your culture encourage people to have tattoo, in case of like Polynesian Tattoo. I am sure there will be a lot of talk about this issue as Japan is getting ready for 2020 Tokyo Olympics.
Guns are banned in japan or they are strictly controlled. I heard one point that even a police guns have no bullet in the first chamber. This does not mean Japan has no mass murders ... just guns are not often used.
Oh by the way, Japanese swords are not permitted either. Did you know that?
So, if you are visiting Japan, DO NOT BRING YOUR KNIFE!!!
Any fixed knife containing a blade length of 15 cm or more requires permission from the prefectural public safety commission in order to possess. Permission requirements also apply to any type of pocket knife over 6 cm (including Automatic Knives), spears over 15 cm in blade length, and Japanese halberds.[32] All knives with a blade length over 8 cm are prohibited from being carried, under a crime law,[33] with an exception for carrying for duty or other justifiable reasons. Possession is considered a petty crime and is not usually punishable by prison time. However, in cases where assault occurs with the knife, there is a penalty of up to 2 years prison or up to a ¥300000 fine. Folding knives with a blade length less than 8 cm (such as Swiss Army knives) are permitted, while SAK with a lock blade are prohibited from being carried.
Tokyo Motor Show, Omocha (Toy) Show and other trade shows in Japan may be the place to go. When you know you are going to Japan, check what kind of trade shows are available while you are in Japan.
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