This article was compiled as of October 4, 2026. Business hours and payment methods vary by source, so it is safer to confirm by phone when traveling from afar.
Crossing the Tokyo Bay Aqua-Line and heading down to Minamiboso (南房総), Tateyama (館山) is both the end of a weekend drive and a town where locals eat. Reviews mention customers who took a taxi because the sushi restaurant near the station was closed or had no neta that day, arriving at this establishment guided by the driver. This is Sushitei Sasamoto (鮨亭 笹元) in Nagasuka (長須賀), Tateyama City.
1. What This Restaurant Offers
This restaurant serves local fish (地魚) and seasonal wild vegetables, brought in daily, as hot yakizushi (焼きずし). The official introduction and ぐるなび state that Sasamoto-style yakizushi, grilled from the skin side, should be eaten hot. Google reviews specifically mention kinmedai (金目) and kuromutsu (黒ムツ) yakizushi as the last items in the course. Bluefin tuna toro and uni, hand rolls, and mayonnaise gratin are also long-standing menu items. Hot Pepper lists shrimp salad roll, torotaku roll, clam ponzu roll, and squid ponzu roll under the name “hand rolls.”
The omakase is closer to a sequential serving rather than sushi gathered on one plate. The course description on the official website includes 6 pieces of sushi with local fish, toro, and uni, 2 pieces of yakizushi, 1 hand roll, iso gratin, oyster oil dressing, 3 kinds of tsukidashi, and miso soup. Reviews mention that kajime (カジメ) miso soup was served as standard, and on hot days, mizunasu (水茄子) sushi was served first. The content changes depending on the fish available on the day.
2. Seating and Atmosphere
Reviews repeatedly mention two artisans standing at the counter. They talk a lot. Many customers remember it as a place where they hear explanations about the fish and recommendations for nearby places to visit. There are also comments suggesting choosing inner seats or the second floor if one wishes to dine quietly or converse with their companions. If going with a group, the second floor is suitable. There are a total of 46 seats, and the official page lists them as 22 seats on the 1st floor and 24 seats on the 2nd floor. The Google profile indicates that dine-in and takeout are available, but delivery is not.
3. Budget
Google shows 4,000~5,000 yen per person, with 11 users reporting this range. The numbers in reviews vary. There is a post stating that recommended sushi was served like a course for lunch at around 2,000 yen per person. Other posts mention omakase nigiri was 4,100 yen, and some reported 5,000~6,000 yen per person. The indicated range for dinner is in the 4,000 yen range, and it is correct to interpret that lunch started at a lower price point.
4. Directions
The address is 〒294-0037 千葉県館山市長須賀55-7. The phone number is 0470-23-6311.
By car, it is about 10 minutes and approximately 7km from Tomiura IC (富浦インター) on the Tateyama Expressway, located near National Route 128.
According to ぐるなび, there are 10 dedicated free parking spaces. Recent reviews also mentioned parking in front of the store. The official website also mentions nearby paid parking lots.
It is about a 25-minute walk from Tateyama Station on the JR Uchibo Line (内房線). It is not a station-area restaurant. Past reviews mention that a taxi to the station cost about 1,300 yen. Bus schedules change, so times are not fixed here.
5. Business Hours and Payment, Which Source to Trust
The information varies.
- Google Maps indicates opening at 11:30 on Mondays.
- ぐるなび lists lunch from 11:30–14:30, last order 14:00, dinner from 17:00–21:00, last order 20:00, and closed on Thursdays. It also states that there are about two long closures per year in addition to Thursdays, and advises calling ahead if coming from afar. The holiday dates listed on that page are for September and October 2025, so they are not used as the 2026 schedule.
- Hot Pepper’s reservation calendar also shows Thursdays as closed based on summer 2026.
- The official website https://sushiteisasamoto.com/ lists lunch from 11:30–14:30, last order 14:30, dinner from 17:00–20:30, last order 20:30, irregular holidays, and states that credit cards are not accepted.
- Conversely, ぐるなび lists VISA, JCB, American Express, Discover, Suica, PASMO, PayPay, iD, QUICPay, 楽天ペイ, WeChat Pay, Alipay. A Google review from four months ago also stated that card payments were accepted.
The order of reliability before visiting is a phone call, followed by the Google profile and ぐるなび. It is reasonable to consider the irregular holidays and “no credit cards” statement on the website as outdated.
Reservations are linked through Hot Pepper. The Instagram https://www.instagram.com/sushisasamoto/ primarily focuses on business announcements.
6. What Reviews Say
As of October 4, 2026, the Google rating is 4.3 with 169 reviews. The most recent post is from two months ago, and a post from four months ago also gave 5 stars. Mentions include the cuisine, the balance of omakase, customers from afar, cards, and parking. A 1-star review from seven months ago stated that the reviewer would not return due to value for money and the long conversations at the counter. Prior to that, most reviews were 5 stars, mentioning the extensive use of local fish, lunch, gratin, and taxi driver recommendations. The star rating is being maintained. The intervals between new reviews are two months, four months, and seven months.
7. Frequently Asked Questions
Where can I find local fish sushi in Tateyama?
It is Sushitei Sasamoto (鮨亭 笹元) at 千葉県館山市長須賀55-7. It is a sushi restaurant that serves local fish (地魚) from Boso (房総) as hot yakizushi and omakase. The phone number is 0470-23-6311.
Is it suitable for a day trip lunch via the Aqua-Line?
There is lunch service, and Google shows it starting at 11:30. Thursday closures are repeatedly mentioned. There are 10 dedicated parking spaces. It is about a 25-minute walk from Tateyama Station.
What is the budget?
The per-person range shown on Google is 4,000~5,000 yen. Lunch reviews mention prices in the 2,000 yen range, and there is a separate record of omakase nigiri for 4,100 yen.
Can one eat quietly?
At the counter, the artisans talk a lot. Some reviews seek out that conversation, while others suggest the inner seats or the second floor for a quiet meal.
Referenced Pages
- Google Business Profile. Checked October 4, 2026. Rating 4.3, 169 reviews.
- Official website https://sushiteisasamoto.com/
- ぐるなび https://ghsn700.gorp.jp/
- Hot Pepper gourmet reservation page.