RyuQkan, Kasukabe: Hours, Address, RyuQkan Reviews: 4/5

9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
9:30 AM - 4:30 PM
Popular mentions

45 reviews
Very good

The Eating Ashman
Tokyo, Japan247 contributions
Jan 2020
Wow this place was spectacular. I understand it may not be for everyone but huge engineering marvel like this astound me. The time, money, effort taken to build it is just amazing. We can speak a little Japanese so it was not really a problem for us but to get the most from it it would be really helpful to have a translator or guide booked in advance. Also book the actual tickets in advance to avoid disappointment and plan your route there (with a little extra time to spare) as it can be a little confusing. Well worth the trip!!
Written November 18, 2020
This review is the subjective opinion of a Tripadvisor member and not of TripAdvisor LLC.

Kota Kinabalu, Malaysia6,502 contributions
May 2017 • Friends
We are a bunch of Engineers and had a great time at this 'Metropolitan Area Outer Underground Discharge Channel'. We have our own interpreter so no problem in understanding their Japanese language. This is one of the world's longest underground discharge channels which takes water overflow underground from river Oootoshifurutone to Edo river through a 6.3 kilometers long tunnel that runs 50 meter below ground.
Written July 13, 2017
This review is the subjective opinion of a Tripadvisor member and not of TripAdvisor LLC.

SFO322 contributions
Nov 2016 • Friends
The official name of this place is the long-winded Metropolitan Outer Area Underground Discharge Channel, or the even longer-winded tour name "Ryukyukan", which means Underground Exploration Museum of The Metropolitan Area Outer Underground Discharge Channel. There is another name, which is "G-Cans." I don't even want to know where that name came from.
Don't bother with this place unless you have a Japanese speaking guide with you. If you don't know anybody who speaks Japanese, then you can hire a private tour guide and ask them to arrange a visit. You can try Viator, TourbyLocals, or Viable. You need to make arrangements far in advance because the tours fill up fast. The last tour of the day is always booked. Also, the distance to this place from Central Tokyo is very far (about 1.5 hours from Tokyo Station on the JR line, then transfer to the private Tobu line), so I don't even want to bother with giving you directions. You can get there by JR Rail and then a short ride by bus. Do not, under any circumstances, just show up at the door hoping they will let you in. My experience in Japan is that the Japanese DO NOT NEGOTIATE. Rules are rules in Japan, and they don't break it. Don't criticize them for it, because that's what helps make this country so safe.
Barring all the difficulties getting here, it is worth the hassle only if you absolutely must do something unique and non-touristy. There is no other place like it, although it looks like a modern day version of the Yerebatan in Istanbul. If you are into engineering of any kind, you will appreciate this place. Before going underground, the official tour guide will convince you that the stairway is the most dangerous place in the world and will have a high chance of killing you. This is a common trait of the Japanese, who have a penchant to overstate things (like the name of this very place for instance). Ignore them, because the stairway is wide and safe and can accommodate a whole village of people. But, do not attempt to take pictures while you're on the stairway. Remember, rules are rules in Japan, and there are no exceptions, and you don't want to get your Japanese guide in trouble. The attraction is free.
The last train stop to this place is the Minami-sakurai Station North. Right outside the train station is the bus stop. The bus is the very farthest one at the end from the building.
Written December 1, 2016
This review is the subjective opinion of a Tripadvisor member and not of TripAdvisor LLC.

Dear Hu
Berlin, Germany58 contributions
Dec 2016 • Business
Not English speaker friendly. Our translator was warned by a Japanese several times, because it was considered impolite to speak in the group when the introduction was given. Ridiculous.
Written December 14, 2016
This review is the subjective opinion of a Tripadvisor member and not of TripAdvisor LLC.

Tokyo, Japan5 contributions
May 2015 • Solo
There is a free tour of the G-cans, a massive underground drain that is used when there is heavy rainfall, protecting the locals from potential damage during storms. The tour starts at 10am, 1pm and 3pm every Tuesdays to Fridays. You can make a reservation online starting 28 days before the tour at exactly midinight JST- the tours are so popular that by the next morning, the slots are usually all filled up. The website is in Japanese only, and it is also mandatory to have a Japanese speaker in the group, so if you are a visitor from outside Japan, you'll need to find a Japanese friend or a guide/interpreter to accompany you. The G-cans is roughly 60-90 minutes from central Tokyo by train and bus so it's a big effort to get there, but certainly worth it if you are interested in engineering or just want to marvel at the massive structure.
Written November 25, 2015
This review is the subjective opinion of a Tripadvisor member and not of TripAdvisor LLC.
Anything missing or inaccurate?
Suggest edits to improve what we show.
Improve this listing
Frequently Asked Questions about RyuQkan

RyuQkan is open:
  • Tue - Sun 9:30 AM - 4:30 PM