We are staying at the Citadines Shinjuku on Yasukuni Dori about a kilometre from Shinjuku station: we fly out of Haneda at 9.45am tomorrow morning so need to be there about 2 hours before (although we have already checked in). We're flying to London on BA. We have booked the Limousine bus for 6.30am, arriving at 7.10am at the international terminal. We have small luggage so we are thinking of just walking to catch the bus at Shinjuku, is the bus stop at Shinjuku easy enough to find? Thanks in advance

The limo site should have a map of the pick up point. Being "at" or "near" a huge station like shinjuku could involve an extra 5 or 10 minutes just finding it!

That, or ask your front desk clerk. A taxi might be the easiest, and shouldn't be too much for a a one km ride.
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IME. nothing is easy to find at Shinjuku! It is the busiest train station in the world!

Its about a twenty minute walk from the Citadines to where you need to go in Shinjuku station with luggage. I would take a taxi myself not only for the convenience but to save you the hassle of finding the correct bus stop. Actually its pretty easy to find but the taxi will take you to the spot and only cost you the drop charge of 700 yen. Small price to pay to avoid all the hassle. Have the desk person at the Citadines write you a note to the taxi driver telling them exactly where to go. Here is a little info on taking a taxi in Japan.

https://www.japan-guide.com/e/e2021.html

Aloha!

But if you insist on walking to Shinjuku station you will have to make your way up to the fourth floor with luggage. There are stairways, elevators and a series of escalators but finding those in a busy Shinjuku station may prove your demise lol. Here is a picture of the new bus terminal we used in May of this year.

https://www.japan-guide.com/blog/sch...er/160409.html

Aloha!