Here is some very interesting information concerning the number of 3G base stations NTT DoCoMo in Japan. According to this report from UnwiredInsight, the company currently has 62.800 outdoor HSPA base stations and in addition 29.200 indoor installations.
These numbers are incredibly high, especially when compared for example to the number of base stations Vodafone says it has in Germany (and provides very good coverage with!). According to reports, Vodafone has around 20.000 GSM base stations in Germany and 13.000 HSPA base stations (I assume most are co-located with GSM). Now Germany and Japan are almost equal in size so the number of base stations should also in the same area. But they are clearly not. So I thought that perhaps what they meant was number of sectors. But no, even NTT DoCoMo themselves have released similar numbers and also says it's "base stations".
Well then, looks like they are not beaten anytime soon in this number game.