Stayed here as a couple for 3 nights. Kangaroo Hotel is located approximately 15 minutes away (walking distance) from the Minami-Senju train station, which is served by JR and Tokyo Metro. For those who have trouble reading maps, from the train station, you'd find a nearby railway crossing. Cross that and walk straight on until you see the signage (on your left) which reads "Kinokuniya". Kangaroo Hotel is opposite that landmark.
Kangaroo Hotel has the best room rates in Tokyo however it is a tad far from tourist attractions. The staffs are extremely helpful. The rooms are tiny but cozy. I have to note that it is rather inconvenient for the shower rooms to be located on the ground floor.
For those who love to be on their feet, Tokyo Skytree is approximately 30 - 45 minutes (walking distance) from Kangaroo Hotel.
Heads up, most public transport are closed past midnight. Thus, if you are partying the night away in Shibuya, the only option back to Kangaroo Hotel would be by taxi. Please bare in mind that taxis are VERY expensive in Tokyo.
All in all, I do recommend this small cozy hotel for those who do not mind that it is not located within the heart of the cityMore