Sorry for writing in English. Tokyo is a very nice city for cycling. I didn't take my road bike, but rather the Brompton since it was a business trip and I need to show up at meetings looking rather civilised. This is my first time taking a bike to Tokyo, or even overseas and I think the Brompton was the perfect bike unless you're going on a 100% cycling tour (in which case you may want to bring a road bike to cover more distance). So what's so good about the brompton? 1. Size and weight. My bike weighs ~10kg without any weight-weenies titanium option and so it was an ok size to be carrying inside a train, which you should consider as Taxi from Narita to Tokyo may cost hundreds of dollars. (I had a Taxi ride from Haneda airport to downtown Tokyo once, it was ~$200. I checked for an Uber and got a quote for ~$400 from Tokyo to Narita Airport). So you need to be able to get your bike comfortably on the train. With the brompton, I got the hardcase which doubles as a luggage and I put my clothing on the same brompton hardcase (use plastic bags to keep dirt off). Total came out to be ~25KG. Bike was ~10.5kg, hardcase about 4kg. The rest of my stuff was in a 32L Deuter backpack. So I had a backpack and the hardcase with roller wheels. No problems getting on/off Train at all. 2. It folds very neatly. Meaning I can bring it indoors in some very casual restaurants, store it in a locker in JR train stations, carry the bike up on many cramped spaces in Tokyo so I don't have to leave it outside risking theft. You can also push the bike around "semi-folded" when moving in and out train stations (make sure to cover the bike with plastic bag.) 3. It's very easy to travel with the bike and still be dressed semi, or even formal with a suit jacket. Also very easy to travel with the bike and with a backpack. 4. The small wheel size makes it very maneuverable in a lot of pedestrian-heavy areas. 5. If you need mix in some time with the bike and train, the brompton is very easy to swich in and out. Very easy to carry inside the train. What I suggest you do: Get a Minoura phone bracket so you can ride while following directions from Google Maps (shown in photo). I got mine in Tokyo, but local Rodalink outlets sell them as well. I found the bracket to be fairly secure, holding my Iphone 6 during cycling. Just be careful when the road is rough, something you very rarely see in Tokyo. Pre-order a Japanese Sim Card with Data connections two weeks before your trip and ask the vendor to mail the simcard to your hotel. Live is so much easier with a working data plan on your phone. Google Maps, Train schedules, everything. I used Sakura Mobile (https://www.sakuramobile.jp/). Google Maps doesn't have a cycling-route option for mapping a route to your destination. Choosing a car route may put you in an expressway which you don't and you can't ride into. So I choose the walking route. Distance time may be very different though between cycling and walking. Trash plastic bags, the biggest size, makes a handy bag to cover your bike with while in Train stations and trains. I forgot to bring some, so I bought them in a Tokyo supermarket, and the ones they have are even thinner than the plastic bags I use at home. You need to deflate your tires when taking the bike on a plane. I didn't know that, so I had to do it while checking the bike in. After arriving at the hotel in Tokyo, I didn't bring any pump *facepalm* and I removed the portable pump that came with the Brompton bike, thinking I wouldn't need it. Guess what? Called the hotel Front Desk and a staff came with a floor pump. I don't think every hotel Front Desk would be able to help you with a floor pump, so better carry a hand pump just in case. I'm not sure you can bring in a CO2 canister, so I bought mine at a cycle shop in Japan. There are a LOT of bike shops around Tokyo. The biggest chain is Y's Road (Google it) and they have different outlets everywhere. Each outlet is specialised for different type of cycling gear. The one in Shinjuku area is very big and if you can only visit one Y's road, visit the one in Shinjuku. Otherwise, I came across probably close to 10 bike stores during my cycling around the city. There must be one store every 1-2 kilometers. The Y's road in Akihabara area only sells mostly cycling clothes. If you need basic equipment like cycling lights and pump, Yodobashi Akiba has a small section selling bikes on the top floor. You can get basic stuff there. For more specialty stuff, look up Y's road's website and find the store that has the category you're interested in (i.e Triathlon bike, Folding bike, etc). I used a two speed brompton with a 50T crank to save weight. My brompton originally is a 6-speed, but the 3-speed rear wheelset is extremely heavy so I got a standard rear wheelset and that cut off some 1.5KG from the weight of the bike. I find it to be the perfect ratio FOR ME. The big gear is enough to do the long stretches in 20-30kph. The small gear is perfect for a lot of the small climbs I had to do going from Shinjuku to Akihabara, BUT I did those climbs out of the saddle. If you are not comfortable for long out of the saddle sessions (there probably were 5-6 long climbs from Shinjuku to Akihabara), you definitely need a 6-speed brompton. Bring a bike lock or buy one there. At first I'm quite paranoid about leaving my bike locked outside as the Brompton is quite fancy. However, you don't want to bring in your Brompton to some places as they consider that very rude. I had a meeting where I had to leave my brompton outside in the open, quiet area, granted, but I was very nervous the whole time of the meeting as I didn't have a lock to lock my bike with. Good thing afterwards I was able to find a bike store and lock my bike, as you need to do it sometimes. Buy a solid bike lock not the cheap wire stuff. I think those are all I can remember for now. Tokyo really is a very nice city for cycling. About 99% of the road are super smooth, smoother than anything you can find in Jakarta. And the 1% rough road is still better than the road in Jl. Sudirman. You can cycle on the road (keep to the most left) or cycle on the sidwalk. When you want to go against the road direction, cycle on the sidwalk, not the road. In Tokyo, if you hit a pedestrian walking, I believe the cyclist would be at fault. However, cycling on the sidewalk is quite convenient as the majority of people give way to bikes. Just don't go very fast on the sidewalks. I recommend 10-15kph at most. Compared to my last trip when I walked everywhere almost exclusively, I think I'm much less tired this time. Cycling is a very efficient way to get around, and apparently less tiring compared to walking+train. I encourage you to try it especially if you already have a brompton and are planning a trip to Tokyo soon. Cheers.