Decide on the spot
Tools, not calculators of your personal data
Each one answers a question at the moment it is asked — in the shop, at the door — from a published rule or from a dated visit. They store nothing, ask for nothing, and run no script.
3 tools No account No answers collected
- Before the till Can I fly with this bottle? Whether the strength printed on the label lets the bottle travel at all, and how many bottles fit under the five-litre ceiling.
- Before the door What a Tokyo bar costs before you order What sitting down adds to the bill at each of the 26 recorded bars, and which of them will not take a card.
- Before the gate Will you get the consumption tax back? The five conditions between the till and your money once the refund method starts on 1 November 2026 — including the one that has to be met before you check your bags.
Why there are only two
A tool is added here when it clears four tests: it answers faster than reading the guide would, its branches can be settled from a published document or a recorded visit, it can be built without storing an input, and it matters to someone already reading this site. A quiz that produces a personality result clears none of them.
The rules behind both tools are written up in full, with their sources and their limits, in the guides.