It is a great place to stay for a few days. Hopefully you will get roommates who are on-board with respecting each other and maintaining the space tidy and clean. Unfortunately this wasn't really my case, but let's talk about Little Japan.
Great location. You've got a 7-Eleven very close-by, some cafes and a beautiful local shrine. There are some restaurants only 5-10 min away. I mostly moved on foot and got to see many interesting places around the area.
You've got Asakusabashi station 8min away and the Akihabara neighborhood at 15min away. If you're coming from Narita Airport, getting off at Kuramae station leaves you only at 8min walk from the hostel.
The female room is cozy. Personally, I really enjoyed my little "fort" – it was spacious enough for me to meditate, read and stretch. There are no blinds but you can manage to block the sun by hanging up your clothes on the racks provided.
Toilets are clean and showers operate correctly. Hot shower was great, although when you exit it gets quite cold – so you better dry yourself fast! Also, there is no place to leave the clean/used clothes or towels without them getting dirty or wet.
Bring your own towel or else you shall rent one for ¥200. There are other "essentials" you can rent. There is shampoo and body soap available for free, as well as fridges where to store your foot.
The kitchen area is very small and quite limited. I like cooking but I didn't have the chance to do so – too crowded and not enough utensils (nor stove) for everyone.
Again, it is great for a short stay. Staff is very friendly. If you ask questions, they'll accommodate you and answer them gladly. It is quite crowded so don't expect to have a relaxing time. It is great if you spend your day outside exploring the city.