Have you been waiting for it? The "Hitsumabushi" function is now available on the "Topic Now" app!
Details of the functionality are unknown. It appears that you will have to download the app to find out.
Yahoo Japan has added a "Hitsumabushi" function to its "What's Hot" application, which displays keywords that are being discussed on Twitter and other sites in a ranking format. Details of the function are unknown. The app can be used from the "Hitsubusubushi" function.
The app can be downloaded for free from the iTunes App Store and
Google Play. Compatible OS: iOS 4.3 and Android 2.1 or higher.
The "Hitsujimabushi" function seems to exist.
April 1 is April Fool's Day. This article is a summary of the announcement made by Yahoo Japan on April Fool's Day.