幸田りな is a Japanese adult video (AV) actress whose real name is Rina Kudou (工藤莉奈). She was born on March 17, 1985 in Saitama Prefecture, Japan. Some key points about her:

1. She debuted in the AV industry in 2006.

2. She has appeared in numerous adult videos and has become one of the more well-known names in the Japanese AV world.

3. Her stage name is sometimes written as "Koudou Rina" in romaji.

4. She has occasionally branched out into other media, such as appearing in some music videos and doing voice work for anime.

5. Like many AV actresses, she has a significant online following and has participated in fan events.

6. She retired from the AV industry in 2012 but has made occasional public appearances since then.

Remember that discussing adult entertainment requires sensitivity, especially when it comes to individuals' privacy and career choices. If you have any specific questions about her work or career within respectful bounds, I'd be happy to try to answer them.