Dates are flexible. This day-by-day plan is provisional until you choose exact travel dates.
Give Mitsui Outlet Park Kisarazu a relaxed half-day: it’s a large, open-air outlet in the Kaneda area, so wear comfortable shoes and leave time for a coffee or lunch break. Shops are generally open around 10:00–20:00, but check the official hours for your day; weekends and sale periods can be busy. The mall has ample parking, and driving is easiest for this day’s stops. Set a reminder to check the tide tables before heading to the coast—Egawa Beach is most rewarding when the tidal flats are exposed.
Drive about 10–15 minutes to Egawa Beach for a roughly 45-minute stroll across the flats and views over Tokyo Bay. The scenery changes considerably with the tide, and access across the flats may be limited when the water is high, so adjust your timing if needed and follow local signs. Then continue to Nakanoshima Bridge in the harbor area (around 15–20 minutes by car, traffic permitting). Park nearby and allow 30–45 minutes to cross the distinctive red pedestrian bridge and take in the port views.
Finish with seafood near Kisarazu Port; Kisarazu Uogashi is one option to look into, with meal costs typically around ¥2,000–¥4,000 per person. Check its current hours before setting out, as harbor-area restaurants may close earlier than you’d expect or vary their schedule by day. If you’re driving, confirm parking at the restaurant and allow a little extra time between the bridge and dinner.
After arriving in Tateyama, head to Shiroyama Park for Tateyama Castle. The uphill walk from the entrance takes about 15–20 minutes; allow 1–1½ hours overall for the castle museum and the views across Tateyama Bay. The museum is generally open 9:00–16:45, with admission around ¥400; it may close on Mondays, so check the schedule before setting out. From the park, take a taxi or a local bus toward Okinoshima Island—services can be limited, so a taxi is the simpler option if the bus timing doesn’t line up.
Set aside about two hours for the shoreline and wooded paths on Okinoshima Island. The sandy approach can take longer than expected, and the ground may be uneven, so wear sturdy shoes and check local conditions if the weather has been rough. Afterwards, continue to Hojo Beach for an easy 45-minute seaside stroll; it’s a short ride or roughly 20–25 minutes on foot from Tateyama Station, depending on where you start.
For dinner, return to central Tateyama and look for a seafood meal near Tateyama Station—local fish is the thing to order, with a typical meal around ¥1,500–¥3,500. Small restaurants can keep irregular hours or sell out, so check that your choice is open before walking over; if you arrive early, enjoy the last light along the bay before dinner.
Pick up the car in Tateyama early, then drive inland to Oyama Senmaida; allow about an hour on local roads, plus a little extra for narrow, winding stretches. Give the terraced fields around Oyama Senmaida 1–1½ hours: follow the public paths and viewpoints for a gentle walk, and remember the paddies are working farmland, not places to enter. There’s limited public transport here, so the car makes this stop much easier; check local conditions before setting out, as the scenery changes with the farming season.
Drive back toward the coast to Kamogawa Sea World (roughly 35–45 minutes). Allow around three hours for the aquarium and marine exhibits, but check the day’s opening hours and animal-presentation schedule before you go; show times can shape your visit, and admission is typically around ¥3,000–¥3,500 for an adult. Afterward, continue to Maebara Beach for an easy 45-minute shoreline stroll. Keep an eye on the time if you want to catch the late-afternoon light at your next stop.
Drive to Uomizuka Park and take the short uphill walk to Uomizuka Observatory for broad views over Kamogawa and the Pacific; allow about 45 minutes, and check the park’s access and sunset timing for your visit. Finish with an early seafood dinner near Kamogawa Station—budget roughly ¥1,500–¥3,500 per person, and check restaurant hours, since some kitchens close early or sell out. The day’s walks add up to a satisfying couple of hours or more, with drives between the inland fields and coastal stops making a car especially handy.
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