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Tokyo Bay Adventure: Bird’s-Eye Views from Umi Hotaru with a Licensed Guide

Tokyo Bay Adventure: Bird’s-Eye Views from Umi Hotaru with a Licensed Guide

Unique Experience

Joined 2026

Mika T.

Identity Verified

Interview-Based Quality Checks

Kanagawa

English

6 hours

Private tour (only you and Mika T.)

Up to 10 people

Umi Hotaru (Sea Firefly) is a large artificial island on the Tokyo Bay Aqua-Line linking Chiba Prefecture and Kawasaki. From this unique sea rest area, you can enjoy open views in the middle of the bay. One of Chiba’s specialties is a premium peanut variety called Q-nuts, named after the letter Q, which follows P. The island takes its name from a tiny bioluminescent sea creature, first described in 1890 by German scientist Gustav Wilhelm Müller.

Itinerary

This itinerary can be customized to meet your needs and preferences. Send me a message with your requests!

10:30 AM

Meeting Point

Hotel meet-up in Kanagawa area ( also possible in Tokyo area)

- If you prefer to meet on-site, the meeting location can be arranged separately. Detailed information will be provided via private message after your booking is confirmed.

12:00 AM

Arrival at Umi Hotaru

Kawasaki (11:10 AM) -> Umi Hotaru (11:54 AM) by highway bus.

Enjoy about two hours of free time for shopping and lunch.

Before free time begins, I will show you the location of the return bus stop to make things easy later.

We will spend a relaxed time enjoying the views before the 2:00 PM undersea tunnel tour.

01:50 PM

Undersea Tunnel Adventure Tour

The tour begins at 2:00 PM and finishes at 3:30 PM, so please gather at the meeting point by 1:50 PM. The return bus departs Umi Hotaru at 3:46 PM. 

Join the official undersea tunnel tour at Umi Hotaru and discover the fascinating engineering behind the Tokyo Bay Aqua-Line. The tour is conducted in Japanese, and I will provide English explanations and summaries to help you understand the key points. You will enter a normally restricted area beneath the island and learn how this impressive undersea tunnel was built and how it operates today. 

Participants usually receive a voucher for freshly fried sardines and a 100-yen discount coupon for purchases over 1,000 yen. So even if the fried sardines look tempting, it is better to wait until after the tour!

03:40 PM

Departure from Umi Hotaru

The last highway bus departs Umi Hotaru at 3:46 PM. Please follow the schedule carefully.

Ending Point

JR Kawasaki Station

Want to personalize this tour?

This tour can be customized to meet your needs and preferences. Click below to send me a message with your requests.

Inclusions & Exclusions

What‘s included

* Licensed guide fee

* Hotel meet-up (Kanagawa area & Tokyo)

What‘s not included

* Public transportation fees: Highway bus – 2,300 JPY (round trip); Children – 1,160 JPY (round trip)

* Meals and personal expenses

* Undersea Tunnel Adventure Tour participation fee (cash only)

+ Adults (13 years and over): 1,000 JPY per person

+ Children (9–12 years old): 500 JPY per person

+ Children under 9 years old may not join the tour

+ Elementary school students must be accompanied by a guardian

Tour Important Information

* Reservations for the official Undersea Tunnel Adventure Tour are accepted on a first-come, first-served basis and are limited to 20 participants. Please contact me before booking so I can confirm availability.

* Participants should be able to walk at least 2 km independently and climb approximately 120 steps (about seven floors). These physical requirements are necessary for safety during the tour.

* This tour involves a fair amount of walking, so please wear comfortable shoes.

* Umi Hotaru itself is wheelchair accessible for sightseeing and enjoying the views. However, the Undersea Tunnel Adventure Tour is not accessible for wheelchair users. It is also not recommended for those with severe back or knee problems.

* Please inform me in advance of any food allergies or dietary restrictions.

Excluding weekends and national holidays.

Important message from the supplier

I can guide you in Tokyo, Kanagawa, Saitama, and Chiba Prefectures, if you pay my transportation fee.

Cancellation Policy

Free cancellation - 8 days prior to meeting time
50% Refund - 3 to 7 days prior to meeting time
No Refund - Within 2 day(s) prior to meeting time

Joined 2026

Mika T.

Identity Verified

Interview-Based Quality Checks

About Tour Guide Mika T.

Hi, I'm Mika, a National Licensed Tourist guide.

I have formal training in practical photography, certified by a Japanese art education association, and will gladly assist you in capturing memorable moments during the tour.

On clear days, you can expect well-composed photos with Tokyo as a stunning backdrop. Photos can be shared digitally after the tour. (Photography support may be adjusted depending on weather conditions.)