National Diet Library (Tokyo, Japan)

The National Diet Library leads Japan as its supreme repository, amassing over 45 million items through legal deposit, including 1.2 million audiovisual materials and 15,000 electronic journals digitized yearly. Its digital preservation technology excels globally, especially in capturing manga archives. Outperforming Trinity College Library (#7) in collection size by a factor of 225, it also maintains a dedicated children's library in Tokyo, making it the largest library in Japan by item count and a benchmark for national digital archiving.