- "はままつ"と言えば、静岡県の浜松市やけど、徳島の"はままつ"と言えば?（里緒菜） 歌とダンスが大好きな濵松里緒菜、27歳です
- "Hamamatsu" to ieba, Shizuoka-ken no Hamamatsu-shi yakedo, Tokushima no "Hamamatsu" to ieba? (Riona) Uta to DANSU ga daisuki na Hamamatsu Riona, 2721-sai desu
- (If I talk about "Hamamatsu", it can be Hamamatsu city from Shizuoka prefecture, but if I talk about Tokushima's Hamamatsu, it's? (Riona) A lover of music and dance, I'm Hamamatsu Riona, 27 years old)
- On April 3rd, was announced as a Team 8 member.
- On August 5th, had her stage debut at Team 8's Party ga Hajimaru yo stage.
- On August 27th, participated in her first AKB48 song, 47 no Suteki na Machi e on the 47th single, Kokoro no Placard.
- On November 7th and 8th, performed at the Cool Japan Festival in Manila, Philippines.
- On December 4th, performed at the Philippines-Japan Friendship Celebration in Manila, Philippines.
- On June 6th, during a SHOWROOM live stream, announced her graduation from AKB48.
- On July 2nd, held her last AKB48 activity and officially graduated from the group.
- On July 5th, was one of the five finalists for the Miss Sophia contest.
- On November 4th, during the final round of the Miss Sophia contest, was crowned the winner.
- On August 29th, released her first solo single, Never Give Up!!.
- On November 7th, released a repackage version of her first single, titled Never Give Up!! ~for you~.
- On July 26th and 27th, performed her new, unreleased songs Tell Me Why and There For Me at the Japan Expo Malaysia.
- On September 29th, performed at a charity event for physically disabled people.
- On November 11th, was a guest on the radio show "FM Tokushima-san no FRIDAY ON LINE" FM TokushimaさんのFRIDAY ON LINE.
- On November 16th, performed in the stage play "O-Getsu KAGURA."
- On December 28th and 29th, performed at the EOY J-Culture festival in Singapore.
- On February 1st, the studio versions of Tell Me Why and There For Me were released in both Japanese and English as part of her second single, Tell Me Why.
- On April 12th, it was announced she would make her debut in Korea.
- The agency she is affiliated with is called "No.1 Media Japan" and is a Japanese agency.
- The majority of members are from Japan.
- They are planning to debut in Korea in June 2021.
- On June 29th, it was announced that PoshGirls would debut in August 2021 with a mini album.
- On July 8th, the Japanese members of PoshGirls released their first music video called "Victory" in honor for the 2020 Olympics held in Tokyo. It can be viewed here.
- On August 18th, PoshGirls officially debuted with the single "GotChu".
- On November 6th, Riona releases solo album in South Korea with tracks 'Tell me why' and 'Someday'.
- 2014.04.03 - Joined AKB48 as a Team 8 member
- 2017.07.02 - Graduated from AKB48's Team 8 (Announcement: June 12, 2017)
AKB48 Senbatsu Election
- 6th Senbatsu Election - Not Ranked
- 7th Senbatsu Election - Not Ranked
- 8th Senbatsu Election - Not Ranked
- 9th Senbatsu Election - Didn't Participate
Releases with PoshGirls
|01||S.O.G:Songs of Goddess||2021.08.18|
- 47 no Suteki na Machi e (Kokoro no Placard)
- Seifuku no Hane (Kibouteki Refrain)
- Aisatsu kara Hajimeyou (Green Flash)
- Ama Nojaku Batta (Kuchibiru ni Be My Baby)
- Yume e no Route (Tsubasa wa Iranai)
- Shishunki no Adrenaline (High Tension)
- Henachoko Support (Koko ga Rhodes da, Koko de Tobe!)
- Issho no Aida ni Nannin to Deaerudarou (0 to 1 no Aida)
- Kiss Shite Son Shichatta
- Mirai ☆ Monster (ミライ☆モンスター) (2014)
- AKBINGO! (2014)
- O-Getsu KAGURA (2019)
- Team 8 Performances: Tokushima, Hiroshima, Gunma, Miyagi
- Hobbies: Dance, music and movie appreciation
- Favorite seniors: Oshima Yuko, Yamamoto Sayaka
- Likes: SNSD
- Special skills: Having an English conversation
- Future ambition: An entertainer who can sing and dance
- Her full name is Riona Crystal Hamamatsu
- She lived in Los Angeles until she was 10 years old
- Was a model before joining AKB48
- She is fluent in English
- One of the 12 selected Team 8 members that performed on Cool Japan Festival at Manila, Philippines on November 7 and 8, 2015
- One of the 12 selected Team 8 members that performed on Philippines-Japan Friendship Celebration at Manila, Philippines on December 4, 2016
- Learnt figure skating in Los Angeles from the age of 3, but because there were no rinks in Tokushima when she returned to Japan, she started learning dance instead
- AKB48 Website
- Team 8 Website