Osaka Base Camp: Castle + Day Trips to Nara, Himeji, Kobe & Koyasan

Land softly — a rooftop-garden stroll and a Namba griddle lunch if you land early, then Dotonbori from the water and okonomiyaki

• MorningNamba ParksNamba Parks' terraced rooftop garden over the station (seed), open from 11:00 — an easy first Osaka stroll by the hotel. Worth it only on an early landing; land in the afternoon and you'd skip this and the lunch below, picking up at the evening cruise and the okonomiyaki dinner.
• LunchFukutaroFukutaro's negiyaki and okonomiyaki off the griddle, a Sennichimae institution near the hotel (seed) — a first Osaka lunch if you land early.
• AfternoonOsaka Wonder Cruise (Dotonbori River)Klook: a 20-minute loop of the Dotonbori canal from and back to Nihonbashi Pier, with night sailings every 30 minutes from 17:00 — book one after dark (about 18:00) and see the neon from the water on your first night.
• DinnerBotejyu DotonboriOkonomiyaki, Osaka's cabbage pancake — Botejyu claims the first mayonnaise-topped one (1946), and it has an English menu.

Nara — Great Buddha, deer and the forest shrine, then a Namba izakaya crawl

• MorningNara: Nara Park, Todai-ji & Kasuga TaishaKintetsu Rapid Express from Osaka-Namba at 08:43 reaches Kintetsu-Nara at 09:21 (weekday timetable) and Nara Park is a 5-minute walk. Do Todai-ji's Great Buddha Hall first, then walk the park to Kasuga Taisha (main sanctuary 06:30-17:30 Mar-Oct) and eat locally; the last direct train back to Osaka-Namba leaves at 23:06, so there is no rush.
• AfternoonUranamba Local Bar & Izakaya CrawlKlook: a guided crawl through Namba's backstreet bars, the kind with no English menus — the point of the guide. It doubles as dinner; book the 18:30-ish start.

Himeji Castle at opening, then Kobe's hillside mansions and harbour at dusk

• MorningHimeji CastleJR Special Rapid from Osaka Station takes 1 hr 1 min, then it is a 15-20 minute walk to the castle, which opens 09:00 (last entry 16:00) — be at the gate for opening. Allow 1.5-2 hours inside: the keep is steep stairs with no lift, and wheeled bags go in a coin locker. Eat locally near the station.
• AfternoonKobe (Kitano & Harbor)JR Himeji to Sannomiya is 40 minutes. Kitano's foreign merchants' houses are a 15-minute walk from Sannomiya; drift down to Meriken Park and the Kobe Port Tower at dusk and have the Kobe beef for dinner. Hanshin runs back to Namba in 40-50 minutes.

Koyasan — the cedar approach to Okunoin and the Hall of Lanterns, the long day

• MorningKoyasan (Okunoin)Nankai from Namba at 08:09 (Limited Express Rinkan) to Hashimoto, the 09:01 local on to Gokurakubashi (09:38; the 09:15 local is the fallback, at 10:02), a 5-minute cable car, then a Nankai Rinkan bus: Okunoin by about 10:15. Walk the tomb-lined approach to the Torodo, the Hall of Lanterns (open 06:00-17:00; past Gobyo-no-hashi bridge there is no food, drink or photography and the mausoleum is not entered), then work back by bus through Kongobuji and the Danjo Garan (both 08:30-17:00, last tickets 16:30). Be at Koyasan Station by 16:30 for the 16:34 cable car and the 16:47 Limited Express Koya (Namba 18:10).

Osaka Castle at opening, Nishinomaru garden, curry-udon, then the Osaka Museum of History by the keep before the Nankai train to KIX — the fuller slate if your flight's later, trimmed from the back if it's earlier

• MorningOsaka Castle & ParkKlook. The keep opens 09:00 (last entry 17:30) — be at the gate for opening, before the tour groups; the park around it is the free half.
• MorningNishinomaru GardenThe lawn garden inside the western wall, with the best view of the keep; open 09:00-17:00 Mar-Oct and closed Mondays (today is Friday).
• LunchTokumasa MorinomiyaCurry-udon by Morinomiya Station, open for lunch only and closed Mondays — a short walk from the castle.
• AfternoonOsaka Museum of HistoryThe Osaka Museum of History stands across the plaza from the castle — an indoor last stop by the grounds you just walked, open to 17:00 (closed Tuesdays; today is Friday). Then collect your bags and take the Nankai train from Namba to KIX; trim this for an earlier flight and head for the airport after lunch.