Reason given:
The Bank of Japan has still not responded to our questions regarding why Japan's yield curve looks like Japan. Find out more at https://discord.gg/wallstreetbets
Edit: In the linked Discord channel, their admins are referencing this image https://media.discordapp.net/attachments/804189364052688931/860922068160741386/unknown.png. It shows "Japan's Inflation Rate and (Minus) Unemployment Rate January 1980 to August 2005".
Not clear yet what the reference is.