[mathrawka]

It's a bit more nuanced than that. The merger was awhile ago, ZHoldings was the parent company of Yahoo! JP and Line.

ZHoldings is now Line Yahoo.

The footer of yahoo.co.jp has changed from Yahoo! Japan / ZHoldings to Line Yahoo.

[lmm]

Legally being placed under the same corporate entity was a while ago. As is normal for big acquisitions, actually merging the businesses is a much slower process (allegedly part of the reasons BA's first days of operating at Heathrow Terminal 5 were a mess is that it was the first time BEA and BOAC were actually working together).

My point is just, from what I've heard the switch to Line Yahoo reflects a real integration of the businesses, not just a change of brand.