Right-wing Rinze (also known as "Japan has not been defeated") is a meme that has been circulating on Japanese Twitter since 2022. It originated from a tweet(now deleted) featuring a fan drawing of Rinze wearing a similar outfit as depicted in this post. She is labeled as "World History Teacher Morino-sensei" and is shown saying, "Japan... has not been... defeated...". While the meme was originally used to jokingly deny that Japan lost the Pacific War, it has gradually come to be used to comment on Japan's performance in the 2022 FIFA World Cup. Note that none of this is canon.
Examples of this meme include post #5855836, post #5853252 and post #8328091

References:

• pixiv encyclopedia: 日本は敗けておりません