Transit
Ginza → Kichijoji
Tokyo Metro to Shinjuku (Marunouchi Line, 20 min), then JR Chuo Rapid Line from Shinjuku to Kichijoji (18 min, direction Takao). Total approx. 45 min. IC card covers both legs. Use South Exit (Koen-guchi) for Inokashira Park — it's right at the park entrance.
Sakura
Inokashira Park
Excellent fit with Ghibli day. Rowboats optional if energy and lines allow.
Meal
Kichijoji lunch — Iseya Koen-ten
80-year-old yakitori institution right at the Inokashira Park entrance (South Exit, 4 min walk). Yakitori from ~100¥/skewer, tatami room upstairs, namazake (fresh sake) is a must. Be seated by 12:15PM — food is slow and you need to be out by 13:30 for the 2PM Ghibli entry. Cash only. Expect a short wait for a table.