Yahoo! Auctions is a service set up by Yahoo! in 1998 to compete against eBay.
Last reported quarter 2018 Q3 it was ¥229.50 billion, up by 4% year-over-year from ¥221.20 billion. From ¥889.70 billion in 2016 it increased by 5% to ¥934.60 billion in 2017.
Source: Yahoo Quarterly Results. Local currency used, not US$.