i’ve spent so long trying to find the creator of this maps, and i finally did! thank you for this!!
like the person you replied to, i really want to help with this map! i live and work in tokyo, actually as a tour guide. i frequently share this map with my guests and they think its great as well. by nature of my job, i travel the city a lot and there are so many places i’ve visited that i think would be great additions.
i don’t know how to go about helping, whether sharing access is a thing or not (not that i’m presuming you’d necessarily share it with me), or if i could send in locations for it to be approved, but i would really really love to help you out here 
my name is gray and if you want to contact me privately you can dm me on insta! @ gray.yy05
if not, i thank you one final time for this map. safe travels for the future