Depart Boston on your booked United flight; settle into window seats if you want daytime photos of departure and an easy transition into jetlag schedule. You have an overnight plus-one arrival in Tokyo.
Arrive and clear immigration/ customs (allow 60–90 minutes), pick up SIM or pocket Wi‑Fi if you didn't pre-arrange one, and grab IC/ Suica card for local travel.
Stroll iconic Shibuya Crossing then wander Cat Street for indie boutiques and cozy cafés — great for people-watching and first-night photos; many shops remain open into the evening.
Hit curated vintage stores (Flamingo, Haight & Ashbury) and independent shops for unique retro pieces and cool-girl outfits — most shops open 11:00–20:00.
Make matching bands at a Tokyo jewelry studio (Asakusa/Omotesando); workshops take 2–4 hours and are intimate, tactile, and very honeymoon-friendly — reserve a slot in advance.
Relax in a retro-Edo themed onsen village with multiple baths and yukata-clad promenades; generally open late (often until 11:00PM), check site for exact hours.
Return to Kyoto (if staying in Miyama) and take an early Nozomi/Hikari to Tokyo to make your JAL domestic flight; plan departure to reach Haneda with buffer for airport transit.
Full-day boat tour to Kerama for crystal-clear water and vibrant reefs; tours depart early (8:30–9:00) and include gear and guides — book ahead to secure spots.
Arrive Incheon/Gimpo, clear immigration, and transfer to central Seoul — choose RYSE (Hongdae) for creative vibes or L7 Myeongdong for skincare/shopping convenience.
Hunt vintage stores and small independent designers for unique honeymoon outfits and keepsakes — many boutiques operate from late morning to late evening.
Board your booked Delta flight home; use the flight to rest and enjoy your honeymoon memories. (You indicated this flight is scheduled 9:30AM departure.)