"How were these undersea tunnels constructed?"
"How do I evacuate if there is an accident or fire in the undersea tunnel?"
The Tokyo Wan Aqua-Line Expressway, which crosses through the middle of Tokyo Bay and consists of over bridges and through tunnels, features a variety of ingenious construction technologies and safety measures that most people may not be familiar with.
We are offering attractive tours for people who want to learn more about the Tokyo Wan Aqua-Line Expressway. We offer tours that guide safety measures such as evacuation facilities in undersea tunnels that are not open to the general public. We look forward to seeing you on our tours.
Our tours are offered throughout the year, every day from Tuesday to Friday, once before noon and once in the afternoon (Two tours a day).
Individual tours: Tuesday and Wednesday (Four tours a week)
Group tours: Thursday and Friday (Four tours a week)
- Please note that tours are not offered on days set aside for inspections, repairs or maintenance of facilities and equipment nor on holidays or times of the year when traffic congestion is expected, namely the Golden Week holidays, Bon holiday period, and the year end/new year period.
- Tour time slots on Thursdays and Fridays may become available for individual reservations if there are no group reservations for these slots.
- Meet-up time (*)
- Transfer and reception
- 10:00～10:10（10 minutes）
- 10:10～11:30（80 minutes）
- Meet-up time (*)
- Transfer and reception
- 14:00～14:10（10 minutes）
- 14:10～15:30（80 minutes）
- Meet-up area: In front of the restrooms on the 1st floor of Umihotaru.
Please make sure to be on time.
- Tours are by advance reservation only. Tours and reservations are categorized into two types: Individual and Group (from 20 up to 50 persons).
- Individual tours are on Tuesdays and Wednesdays, and group tours are on Thursdays and Fridays.
- Instruction and commentary are available in Japanese only. In the interests of safety, please ensure that you are accompanied by someone (foreign language or sign language interpreter, etc.) who understands Japanese.
- Participants must be at least nine years of age. Primary school students must be accompanied by a guardian.
- Individual reservations are available for tour times on Tuesdays and Wednesdays.
- Tour time slots on Thursdays and Fridays may become available for individual reservations if there are no group reservations for these slots. (*)
- Please reserve online (first-come, first-served).
- Up to 7 people may reserve at a time.
- Reservations are accepted for each month and begin at 10:00 am of the first day of the month two months prior to your preferred tour date and are accepted until noon the day before the tour.
Reservations for the month of Mar. 2019 begin at 10:00 am, Jan. 1, 2019.
◆Group reservations (from 20 up to 50 persons)
- Group reservations are available for groups of 20 or more people.
- Group reservations are available for tour times on Thursdays and Fridays. (School, company or community groups, or travel companies who organize tours based on the Travel Agency Act)
- Reservations are by phone.Please contact the Tokyo Wan Aqua-Line Adventure Tour Office. After your call, we will email you a reservation form. Please enter the required information in the form and return it to us by email. You will then receive a reservation confirmation email from our office.
- We accept group reservations based on half-year terms (Apr-Sept and Oct-Mar). Reservations begin at 10:00 am on the first day of the month four months prior to the beginning of each term and close two weeks prior to your preferred tour date. (If the day reservations begin falls on a holiday, reservations begin on the next business day, and if the day reservations close falls on a holiday, reservations close on the last business day before this date.)
Reservations for the Oct. 2019 - Mar. 2020 term begin at 10:00 am, Jun. 3, 2019.
Thursday and Friday tour dates that remain unreserved by a group by two weeks before will be made available one at a time for individual reservations starting the next business day.
Maximum tour size
- Up to 20 persons for each tour time slot.
◆Group tours (from 20 up to 50 persons)
- Up to 50 persons (minimum 20) for each tour time slot.
- Groups with more than 25 persons will be split into two groups.
Tour Admission (per person including consumption tax)
(13 years old and over)
(9 to 12 years old)
Children under nine years of age may not join the tour. Primary school students must be accompanied by a guardian.
What to bring
- Admission (Please pay cash. We do not accept credit cards or other forms of payment.)
- A well-worn pair of shoes that are not slippery
- A copy of your reservation confirmation email (individual guests)
- A copy of your reservation confirmation email (groups)
If you forget your copy of this email, please give us your reservation number at reception.
Information on the Adventure
1. We meet up in front of the restrooms on the 1st floor of the Umihotaru parking area. Please make sure to arrive by the meet-up time. At the meet-up time, the group moves to the management building.
2. The group completes reception at the management building and is given an explanation on how the tour will proceed.
3. The group watches a picture that explains how the Tokyo Wan Aqua-Line was constructed.We then head out for the emergency evacuation passage in the undersea tunnel.
The tour takes approximately 1.5 hours and there are no restrooms along the way, so please take care of your restroom needs at the restroom on the 1st floor.
4. We cut across the parking lot and head for the undersea tunnel entrance.
5. We enter the undersea tunnel entrance and finally sneak into the emergency evacuation passage in the undersea tunnel.
The area beyond this fence is usually not open to the public.
You won't see any cars driving in this huge tunnel. What do you think this tunnel is for? You will find out later in the tour (Stay tuned!).
6. We walk through the emergency evacuation passage and the guide gives an explanation of the undersea tunnel's disaster prevention facilities.
Here we are in the undersea tunnel, where our guide gives us an explanation right under the expressway. This means that cars are driving over the ceiling of where we stand, which is 18 meters below sea level, i.e., underwater.
7. Once the explanations are over, we climb 120 stairs (the same as climbing to the 7th floor of a building) on the emergency staircase to reach the management building on the 1st floor. You can do it! Way to go!
8. On the deck on the Kawasaki side, you will be explained about Kazenotou, dedicated fire engines, cutter face and other facilities.
Weather permitting, this deck also gives you views of Mt. Fuji, Tokyo Tower, and Tokyo Skytree.
9. We go back into the management building and receive a gift. Please take this to home as a memento of this tour.