Overview
Nangoku Hotel gives you an easygoing hot spring stay near the southern tip of Chiba’s Boso Peninsula. Located in Shirahama, Minamiboso, the hotel places you close to the Pacific Ocean, coastal scenery, flower fields, beaches, and Cape Nojima. The area enjoys a mild climate, making it an inviting choice for a seaside break throughout the year.
You come here for a relaxed stay rather than a formal ryokan experience. Natural hot spring baths, buffet meals with drinks included, karaoke, table tennis, cycling, and a summer pool give you plenty to enjoy without leaving the hotel. When you want to explore, the coast and several of southern Chiba’s best-known sights are only a short drive away.
The hotel works well for couples, families, groups, and solo stays. You can choose an ocean-facing room when the view matters most, or book a simpler room when you plan to spend more time bathing, dining, and sightseeing. From central Tokyo, the drive takes about two hours under normal traffic conditions.
Accommodation
Nangoku Hotel has 103 rooms across the main building and annex. You can choose from Japanese rooms, two-room Japanese layouts, and Japanese-Western rooms. The interiors are simple and practical, giving you enough space to rest after a coastal drive, hot spring soak, or full buffet dinner.
The main-building Japanese rooms offer 10 tatami mats and suit stays ranging from solo breaks to family trips. You can sit around the low table during the day, enjoy tea, and sleep on futons prepared on the tatami at night.
For more space, the main-building two-room Japanese category combines a 10-tatami room with an additional 4.5-tatami room. These rooms face the Pacific and work especially well when you stay with family or friends and want separate areas for relaxing and sleeping.
The annex also includes 10-tatami Japanese rooms. The annex Japanese-Western rooms combine tatami space with beds, giving you the atmosphere of a Japanese stay with the ease of Western-style sleeping. Ocean views are available in selected categories and plans, so choose an ocean-view plan when seeing the Pacific from your room is important to you.
Your room includes hand towels, bath towels, yukata, toothbrushes, shampoo, conditioner, body soap, a razor, comb or brush, refrigerator, safe, and hair dryer. Free Wi-Fi is available in every room. Pets cannot stay at the hotel.
Dining
Dinner is served as a 90-minute Japanese, Western, and Chinese buffet. You can choose as much as you like from dishes such as sashimi, grilled food, simmered dishes, fried items, salads, fruit, ice cream, and other desserts. The selection changes with the season and available ingredients.
Soft drinks and alcoholic drinks are included during dinner, so you can enjoy beer, whisky, sours, sake, and other available choices without adding a separate drinks package. The relaxed buffet style makes it easy to build your meal around your own appetite, whether you want seafood and Japanese dishes or a mix of hot food, salads, and desserts.
You can add special dishes when you want to make dinner more indulgent. Current à la carte choices include domestic wagyu steak, a whole simmered kinmedai, and abalone grilled with butter. Advance ordering is recommended because availability may be limited.
Seasonal food fairs add extra dishes to the regular buffet. From May 6 to July 17, 2026, the hotel is serving a Nasu Kogen pork skewer fair with pork belly, pork fillet, asparagus, potato, and shiitake skewers, along with sauces and toppings inspired by regional flavors. Seasonal fair menus and dates change, so the buffet may offer a different theme during your stay.
Breakfast is a 60-minute buffet with Japanese and Western choices, along with unlimited soft drinks. Your exact breakfast and dinner starting times are set according to the number of people staying that day, so you receive the current schedule when you arrive. Both meals are served in the main building’s first-floor buffet venue.
Onsen and Wellness
Nangoku Hotel draws natural hot spring water from its own source, an uncommon feature in the Boso area. The spring is a weak chloride spring containing metasilicic acid. The water holds warmth well, making it especially pleasant after time outdoors or a long journey.
You can soak in a spacious indoor bath and an adjoining open-air bath. The outdoor bath lets you enjoy the coastal air while the warm water surrounds you, while the indoor area gives you a sheltered place to stretch out in a larger tub. A sauna adds another way to warm and refresh your body.
The large indoor baths, shared open-air baths, and sauna normally open from 2:00 PM to midnight and again from 5:30 AM to 10:00 AM. On Wednesdays, afternoon bathing begins at 3:00 PM. The bath area closes between midnight and early morning for safety, cleaning, and energy-saving measures.
The spring’s traditional bathing indications include support for cuts, neuralgia, rheumatic discomfort, and muscle pain. You should enjoy these as traditional onsen indications rather than medical treatment.
A reservable private open-air bath gives you a more personal bathing setting decorated with colorful stones, cycads, and tropical-style details. It uses heated water rather than natural hot spring water. You can reserve a 45-minute session after arriving, with bookings accepted at the front desk on a first-come basis. An additional fee applies.
If You Have Tattoos
If you have tattoos, you cannot use the shared indoor hot spring baths or shared open-air baths. To discuss use of the reservable private open-air bath, contact the hotel before your stay. The private bath uses heated water rather than natural hot spring water.
Facilities
Nangoku Hotel includes a first-floor buffet venue, natural hot spring baths, shared open-air baths, a sauna, a reservable private open-air bath, an ocean-facing lobby, a shop, karaoke rooms, a game corner, table tennis, mahjong, go and shogi rooms, vending machines, a yukata corner, a decorative stone garden, free rental bicycles, a seasonal outdoor pool, Wi-Fi in every room, and free parking.
The third-floor shop opens from 8:00 AM to 8:00 PM and carries Chiba products such as sweets made with Boso loquats and prepared seafood items. Vending machines on the second floor sell soft drinks, alcoholic drinks, and ice cream around the clock.
Private karaoke rooms are free to use for 60-minute sessions and require a reservation after arrival. Table tennis is also free, with 50-minute reserved sessions. Mahjong, go, and shogi spaces can be booked at the front desk, giving you simple ways to enjoy the evening after dinner and bathing.
The outdoor stone garden combines polished decorative stones with cycads and stays open until sunset. Free bicycles are available from 7:00 AM until sunset, allowing you to explore nearby streets and the coast when the weather is suitable. Five bicycles are available, and children’s bicycles with training wheels are not provided.
The outdoor pool opens from July 10 to August 31, 2026. You can swim from 2:00 PM to 5:00 PM on arrival day and from 8:30 AM to 10:30 AM the following morning. A shallow children’s pool is available beside the main pool. Pool access is free during your stay, but you need to bring your own swimwear and pool towel. You cannot use the pool before check-in or after check-out.
Activities
You can enjoy much of your stay inside the hotel. Begin with a soak in the natural hot spring, change into your yukata, play table tennis or sing karaoke, then head to the buffet for dinner and included drinks. In summer, you can add pool time before returning to the baths in the evening.
The free rental bicycles give you an easy way to see more of Shirahama. You can ride through the coastal neighborhood, feel the sea air, and take in the slower rhythm of southern Minamiboso. Bicycle use may stop during rain or strong winds.
Nojimazaki Lighthouse is about five minutes away by car. The lighthouse and surrounding coastal path give you broad ocean views, rocky scenery, and a well-known sunset spot near the southern edge of the peninsula. Nagura Beach is also about five minutes away and offers gentler waves during the summer swimming season.
Megane Bridge is around five minutes away by car, while Minamiboso Chikura Bridge is about ten minutes away. Komatsuji Temple, known locally for its forest and autumn colors, is about twelve minutes away. For a longer day trip, Kamogawa Sea World takes about one hour by car.
Seasonal flower displays are another highlight of the wider region. Winter and early spring bring fields of yellow rapeseed flowers, while roadside farms, coastal parks, and local markets add color and local food to a drive around Minamiboso.
Additional Features
Nangoku Hotel is located at 2544-1 Shirahama, Shirahama-cho, Minamiboso, Chiba. Check-in begins at 3:00 PM, and standard check-out is at 11:00 AM. Your plan may set a different final arrival time, especially when dinner is included.
Free parking is available for up to 103 vehicles. You do not need to reserve a standard car space, but you should contact the hotel in advance when arriving in a minibus or another large vehicle.
From Tokyo, you can drive through the Tokyo Bay Aqua-Line, Futtsu-Tateyama Road, and Tomiura Interchange before continuing for around 40 minutes. By public transport, you can travel from Tokyo to Tateyama Station, take a local bus for around 40 minutes to Awa-Shirahama, and walk about one minute to the hotel.
Major credit cards, electronic money, transport IC cards, and QR payment services are accepted. Nangoku Hotel suits you when you want a casual coastal stay with natural hot spring water, buffet dining, included evening drinks, and plenty of free entertainment. You can look toward the Pacific, explore southern Chiba, and return to a hotel where meals, baths, and simple activities keep your stay easy.
