Take a look at all the main Finnish bands and what do you notice?
Finnish bands:
DEATH
Adramelech
Amorphis
Children Of Bodom
Demigod
Kalmah
BLACK
Alghazanth
Beherit
Evemaster
Finntroll
Funeris
Nocturmun
Walhalla
POWER
Calesty
Citadel
Sonata Arctica
Stratovarius
Thunderstone
DOOM
Rapture
Spiritus Mortis
GOTHIC
Poison Black
Finnish bands:
DEATH
Adramelech
Amorphis
Children Of Bodom
Demigod
Kalmah
BLACK
Alghazanth
Beherit
Evemaster
Finntroll
Funeris
Nocturmun
Walhalla
POWER
Calesty
Citadel
Sonata Arctica
Stratovarius
Thunderstone
DOOM
Rapture
Spiritus Mortis
GOTHIC
Poison Black