Just Turn Up
No ticket, no booking, no gate. The grounds are open all night; the main hall opens at 6am.
Free
Check availability Civitatis
Free, open, and impossible to book. Tokyo's oldest temple has no ticket, no gate and no closing time for the grounds. The only decision is what hour you show up.
THE BIG QUESTION
We compared both, factor by factor.
Go alone, and go early. If you want the history, an Asakusa walking tour covers the temple, the backstreets and Sumida river in about two hours and is a fair purchase. Just do not confuse it with needing a ticket, because there is nothing here to get you into.
See the tour →No. Entry is free, there is no gate, and the grounds stay open around the clock. Anyone selling you a Sensō-ji ticket is selling you a tour with a temple in it.
Yes, and it scores 7 here anyway. The score measures booking urgency, not quality. There is simply nothing to book, so the number stays near zero no matter how good the place is.
Before 7am or after 8pm. Between about 10am and 5pm the approach through Kaminarimon is shoulder to shoulder and the photograph you wanted is full of other people taking it.
See everything worth booking, and everything you can skip.