Ueno is by far our favourite place when we stay in Tokyo (my third time back). YK building is a great walking distance to the amenities that Ueno has to offer.. the station is 3 stops from Narita on the Keisei line and the park is unmissable. The JR line is through Ueno main station for those with passes. 30 min from Shinjuku on the JR line.. 5 min from Akihabara on same. Asakusa very close and the Ginza line 5 min walk away. Convenience store on the corner is amazing for snackage. The apartment itself was great. Easy no fuss access, comfortable beds with amazing doonas, reliable wifi (but if u have a portable battery take with you for extended day trips). All in all - perfect accom. Thank you!