5/5 is a group of five professional Finnish folk musicians strongly connected to South Ostrobothnia, a region in western Finland.
The music the band composes and plays is a unique blend of Southern Ostrobothnian traditional folk music, Old-Time and Americana. "South-Ostrobothicana" if you will.
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The latest 5/5 full album Festarifiilis was released in September 2019.
The latest single to date Pikku-Lauri ja paholainen was released in 2024.

5/5 is:
Lauri Kotamäki - melodeon
Arttu Mäkelä - guitar
Miia Palomäki - fiddle
Sampsa Kujala - bass
Joonas Ojajärvi - mandolin

Vila plays new folk music inspired by traditional lullabies. Our music is like a warm embrace, inviting listeners to rest from the hustle and bustle of the world. We have listened carefully, rested in the soothing sound of traditional lullabies, and created new ones. Improvising and composing intertwines with free interpretation of folk melodies and lyrics found in archives.

Vila’s debut album was released in 2024 by the Finland-Swedish Folk Music Institute.

Vila is:
Juulia Björn - voice, harmonium, percussion
Kirsi Ojala - wind instruments, harmonium, voice
Hanna Ryynänen - kantele
Joonas Ojajärvi - plucked string instruments, voice

Kårot (Kånala-Rotterdam) is a duo founded in 2025 by Nea-Maria Korpelainen (Master of Music Codarts Rotterdam, Master of Music SibA Helsinki) and Joonas Ojajärvi (Master of Music SibA). The project was born from a shared need to create music that authentically reflects its members, free from stylistic preconceptions.

Both musicians have strong backgrounds in Nordic contemporary folk music and have also studied a variety of musical styles outside the Nordic countries. Drawing from these influences, they create rich, nuanced instrumental music rooted in and reshaping Nordic folk traditions—music that lives and breathes in the moment.

Kårot is:
Nea-Maria Korpelainen - violin
Joonas Ojajärvi - cittern

Jari Rättyä & Käärmekeitto is a "slavic-blues" quartet led by  Jari Rättyä, a songwriter based in both Helsinki and Kainuu. The sound of the group is something between americana, delta blues, nordic folk and slavic folk. The latest release Kuulkaa kadonneet came out in the late summer 2025 and is purchasable from bandcamp.

Käärmekeitto is:

Jari Rättyä - vocals, electric guitar, dobro, harmonium etc.
Joonas Ojajärvi - bouzouki and mandolin
Ari Keinänen - bass guitar and upright bass
Marko Soramäki - drums, percussion

Kantele artist Hanna Ryynänen and cittern player Joonas Ojajärvi bring alive old Nordic and Karelian melodies and themes in their duo's unique musical language. 

Hanna Ryynänen - Saarijärven kantele

Joonas Ojajärvi - cittern

An overtone flute driven group started by Janne Ojajärvi. The trio's rare instrument lineup with cittern and beatboxing accompanying different overtone flutes likely makes it unique in the whole galaxy.

Venla Blom - beatboxing, vocals

Janne Ojajärvi - overtone flutes, live sound engineering, vocals

Joonas Ojajärvi - cittern, vocals