Izakaya Spring

yes

There is a free shuttle bus from Shinagawa Station.

Safe. Late night walking is okay

Daijobu

The stop from the limo bus is Shiba, Ebisu, Shinagawa. But if you go to the counter and tell them you want to go to tokyo marriott they will get you on the right bus. They all speak enough English to understand and help... we had no problems and I'd highly recommend the limo bus company.

Google please

This is in Tokyo, close to the Shinagawa train station that have trains going everywhere. Not sure if this answers your question though...

Go to hotel website to reserve or call the hotel directly to reserve. Room cost depends on you own preferences and choices

Unfortunately, "Tokyo Marriott Hotel" is not allowed according to the hotel's pet policy.