Can I walk on the center of the path?

Traditionally, the center of the path is reserved for the deity. Walk on the left or right side of the approach.

What should I do if I see a monk?

Do not stop them for photos. A small, polite nod is sufficient if you make eye contact.

Do I need to bow every time I enter a gate?

It is common practice to perform a slight bow toward the main structure whenever you cross through a torii gate or main temple gate.

How to behave respectfully at Japanese temples

Treat temple grounds as places of active worship, not just tourist photo opportunities. Maintain a quiet volume, follow signage for restricted photography, and always purify your hands at the chozuya before approaching the main altar.

Purify at the entrance. Find the 'chozuya' (water basin) near the gate. Use the wooden ladle to rinse your left hand, then your right hand. If you wish to be thorough, pour a little water into your cupped hand to rinse your mouth—do not touch the ladle directly to your lips.
Respect the silence. Turn your phone to silent mode before entering the temple gates. Keep your voice at a whisper; if you are with a group, step away from the altar area before having a conversation.
Check photography rules. Look for signs—a camera with a slash through it is universal. Many main halls strictly forbid photos of the interior altar. If you aren't sure, assume photography is prohibited.
Practice proper prayer etiquette. Approach the offering box, toss a small coin (5 or 10 yen are standard), bow twice, clap your hands twice (only at Shinto shrines, not Buddhist temples), bow once more, and then move aside.

Can I walk on the center of the path?: Traditionally, the center of the path is reserved for the deity. Walk on the left or right side of the approach.
What should I do if I see a monk?: Do not stop them for photos. A small, polite nod is sufficient if you make eye contact.
Do I need to bow every time I enter a gate?: It is common practice to perform a slight bow toward the main structure whenever you cross through a torii gate or main temple gate.