The youngest member of Children of Bodom was born in the town of Espoo, in Finland. His musical training began at the age of 11, by playing the guitar. He got interested in the heavy metal scene through his brother, who listened to bands such as Slayer and Pantera with his friends. Before he had only had contact with rock 'n roll and glam bands. As time passed, his interest started leaning towards heavier bands, until he discovered black metal and death metal bands of the likes of Burzum and Cannibal Corpse.

His played at his first band at the age of 13. It was called Aivokasvain. He was part of the band for two years, and then quit, switching his main instrument to the bass.

When Samuli Miettinen quit Inearthed (the original name of Children of Bodom) in 1996, Hennka joined the band, adopting the 5-strings bass.

He is the frontman of the band when it comes to interviews and public appearances. Other than the fact that he can speak Finnish, English, Swedish and some French, he is also the most equilibrated member of the band, in a general way.

He has an interest for political science and history, and uses some of his free time to study those subjects (coursing at the University of Helsinki). He is also into sports, and has a passion for football (soccer). However, he also enjoys golf.

Henkka is completely dedicated to Children of Bodom, and doesn't have any side-project. According to him, the most important things in his life are his family and his band.

On a side-note: Henkka is responsible for the backing vocals both on studio and live.

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