I've stayed in hotels in most countries in Europe (France, Spain, Germany, Italy) and I had NEVER seen a room as small as the one I got here. I couldn't take 2 steps without bumping into something. I had to put my bag on the bed to open it: the stool provided by the hotel was under the desk, and frankly had I pulled it out from there, I wouldn't have had any room to move. BUt first, getting to the hotel is a heck of a chore. The airport limousines buses that run from the airport do not stop at that hotel, although: they stop at the ANA Intercontinetal. at the Excel Tokyu, and others. So, I took a taxi from the airport, and the cab driver stopped 3 times to ask for directions (with the meter running). By the time he found the hotel, the meter had run to 22,000 yen (so, I was in for almost $300 at the $1/7500 yen FX rate) while the Japanese friend who had recommended me the hotel had told me the cab ride would cost me about $150 (i.e. half of the actual fare). Then when we got to the hotel, they have stairs in front, and not a ramp in sight (so clearly they don't expect their guests to have any bags). No porter, or bell boy. You haul your bags yourself and see how well you manage to get them into the lobby which itself will be crowded if ever there are more than a dozen people there at a tme. The lobby area can reasonably accommodate 8 to 12 people: the 2 chairs and the sofa can take 5. Another 2 can stand by the coffee machine, and 4 to 5 will be shoulder-to-shoulder in front of the counter. (I am not exaggerating).
But will all these negatives, the staff is at least courteous and tries to accommodate (in the areas where they can: there's absolutely nothing they can do about the rooms size).
The TV channels are all Japanese. So good luch trying (at the end of a busy day) to watch anything that your brain can comprehend. Luckily, I had saved some episodes of Law & Order on my laptop.

Restaurant: Contrarily to what some people have said here, the hotel does NOT have a restaurant. However, there is an Italian restaurant adjacent to the hotel, which has cleverly managed a connecting door allowing you to go from the hotel lobby into the restaurant. But you CANNOT charge your restaurant consumption onto your bill, and you cannot order room service. If the restaurant was so much as "affiliated" to the hotel, as a guest in the hotel, you would be able to charge your dinner and pay one final bill. So, be prepared to settle your bill with cash or credi card.

Location: In terms of location, I think one can do better 10 times. The hotel is remote from all the activities, and it is on a steep slope, whichever way you take. The first couple of days, I did enjoy stretching my calves. But then, that got old quickly. So, I berated myself the rest of my stay for not chosing something in the mainstream area, or closer to subways.

Price/Quality ratio: I don't know how much the other hotels would have charged (a Japanese friend had made the booking for me) but I stayed in the B Akasaka from Aug 7 to 14. I so wished I had booked somewhere that would allow me to get quickly back in my hotel at the end of the day. This was not the case in this hotel. But the people at the front desk really try to make up for the hotel's shortcomings. But there's no concierge. Whoever are the 2 people manning the front desk at the time, they're the go-to folks for everything else, including answering phones. So, good luck trying to get their attention in busy times. One good thing: the hotel has washing machines and dryer. So, for us, it was good to be able to wash our clothes before leaving to our next destination. Also, on days when you are too tired to venture out and face that slope on the way back, the hotel has a vending machine selling noodle soups. I wouldn't buy them every day, but one night, I was very tired, and the restaurant next door was closed (reserved for a function). So, I didn't have options. That vending machine and its noodles soup saved my life...

I stayed here for one night during a layover in Tokyo.
For the price, it doesn't get too much better in Tokyo. Location wise is slightly inconvenient on foot (it is an uphill walk from the station, which is about a 5 minute walk) and the station isn't the most convenient subway line in Tokyo, but if you are cabbing its a great location.
the room is small but thats expected for a business hotel. They were very clean, free internet (which is key for any traveler in Japan), and free wifi in the lobby areas. The staff was very professional and nice.

One nice thing about the B here is the bathrooms are HUGE (why I don't know but makes up for the small room). Amazing shower also...one of the best showers I've experienced in a business hotel in Japan.

Although I didn't reserve with a breakfast option, they still offered me a free breakfast ticket. The breakfast buffet was verrrrry good, and they had terrace seating which was great for the crisp May spring/summer morning of Tokyo.

If you are in the Akasaka area and are looking for a not so cheap but great sleep stayover, I'd highly recommend.

Stayed at B Akasaka for a week. When we arrived at subway, we met a local who took us to the hotel via the secret lift. This was a huge help as we were hot and bothered after our travels and carrying luggage up hills and stairs would not have been fun. As has been mentioned before, take exit 3b, follow road until the bend and lift is in to your right.
Reception area was small but comfortable. Loved the smell of it! Wifi is only available here, not in rooms, so you often find people gathered here. There's a coffee machine for free tea and coffee throughout the day - good for a pick-me-up after a long day sightseeing. Reception staff are very friendly and helpful.
Room was clean and comfortable. We had a twin room. Small but still not as tiny as i had imagined. We were travelling with 2 suitcases and 2 backpacks and were able to store them underneath desk. No wardrobes but there is a hanging rail. Shower was great. Soundproofing between rooms is good but you can hear noise in hallway, not an issue unless fellow guests are making noise in corridors at unsociable hours. Blackout blinds were great for getting a good nights sleep.
Breakfast came as part of the deal. There was a reasonable selection including traditional Japanese breakfast with miso soup, grilled fish, rice and pickles, as well as toast, croissants, scrambled eggs, hotdog sausages, potato wedges, fruit, yoghurt and cereal. Always something you could eat but don't think I would have eaten there daily if it wasn't included in room price.
There is also a spa attached. As we had a packed schedule, i didn't have time to try this but treatments looked good.
Before booking, we were concerned about which area to stay in. Most suggested Shinjuku or Shibuya. Similar hotels here seemed to be a lot more expensive. We worried about being in the middle of nowhere but found this location suited our needs. Spent most of our day sightseeing and then had dinner and drinks in evening. Metro runs until midnight if you are looking to venture to another area, although there are plenty of restaurant and bars around the hotel too.
Overall I was happy with the stay here and would recommend to others.

Stayed for 3 nights in March and overall the hotel is up to standard. The location is around 10 minutes from Akasaka subway station but you need to walk either uphill or along a long stairway before reaching there, as it was still pretty cold at night in March and I returned to hotel usually after 11pm, the walk might be quite a struggle given the strong winds along the way but in general it's not a too difficult walk. I took taxi from Tokyo station upon arrival and also taxi to the nearest hotel to get on airport limousine to Narita airport though because it might be kind of difficult to get there just by walking uphill. Staff speaks good English and is ready to help to book limousine tickets from the nearby hotels. Rooms are in general typical Tokyo room size but is comfortable enough for us Asians. Might be a bit small for foreigners of larger body build but I note a lot of foreign tourists staying here. Breakfast is buffet style. One thing however though the hotel is a new one and kind of "business-type" style, only the lobby offers free wifi but not in the rooms.