Famitsu

Famitsu is a Japanese video game magazine. They also function as a sales tracker operated by Gzbrain and release their numbers on the web and in their weekly magazine. It is often called the superior tracker because they are more accurate than Media Create and release a top 30 with numbers every week instead of a top 20.

Methodology
Famitsu collects retail data like all the other trackers. They also track download cards/codes which count as a retail unit. Every month they release estimates of the most downloaded games. This makes Famitsu the only tracker to release retail and digital numbers.

Unlike Media Create, Famitsu does not track Amazon.co.jp. This has caused major discrepancies in the past whenever Amazon would bundle games with Nintendo Switch consoles.

Links
https://www.famitsu.com/biz/ranking/