Before starting let me get this out of the way: indoor mapping on digital devices is in the stone age and basically sucks. It doesn’t matter if it’s Google, Apple or Yahoo Japan Maps. It all sucks, some less than others. That would be Yahoo Japan Maps.
Indoor maps overwhelm the user with mediocre information and detail they don’t need, map vomit, and are more confusing than helpful. Getting intelligently collected human curated high density map information and presenting it in clear, concise user-friendly fashion is a challenge, especially so for indoor maps which have to collapse 3D information into a 2D format.
Apple Maps Japan has not officially announced indoor map availability yet but you can see it in action at Narita International Airport on iOS. Here is a quick comparison big view of Narita with Apple Maps, Google Maps and Yahoo Japan Maps.
As usual Yahoo Japan Maps has the most intelligent use of Japanese text, high contrast and different text sizes to emphasize significance but it ends here: Yahoo Japan Maps does not have indoor maps for airports as they have focused efforts on major train station indoor mapping instead. In terms of real everyday use, it’s the smarter choice.
Comparison closeups of Terminal 1 3rd Floor show that Apple Maps still suffers from the same old problems of using 3rd rate 3rd party data suppliers with poor vetting and coordination: some stores are located out on the tarmac. The Apple Maps reboot effort has yet to be felt in Japan.
A comparison closeup view of Terminal 1 4th Floor check in and store areas: Apple has a good idea in offering canned search buttons for Check-in, Restaurants, Cafes, restroom, etc. Unfortunately the iOS UI control puts Japanese names at the bottom of the every list and tapping a canned search button only highlights results that add another layer of visual noise. It would be much better if canned searches also hide or grey out unrelated details and offer Japanese names at the top of every list with alphabetized English names at the bottom. Meanwhile Google Maps uses the same hunt and peck ‘one size fits all’ search conventions for indoor and outdoor maps.
Realistically I cannot imagine using any of these indoor maps in real life on an iPhone screen. It’s much easier walking to an information booth or asking airport or station staff for directions. Until indoor maps and Siri get much smarter and tightly integrated with highly reliable information on the backend, I don’t see these solutions solving problems for anybody.