Radiation curable ink jet composition and ink jet recording method

A radiation curable ink jet composition comprising:

• a monomer A that has one of a (meth)acryloyloxy group and a (meth)acryloyl group and has a cyclic structure containing one or more nitrogen atoms and one or more oxygen atoms in addition to the (meth)acryloyloxy group and the (meth)acryloyl group;
• and
• a monofunctional monomer B that has one of a (meth)acryloyloxy group and a (meth)acryloyl group, and has a cyclic structure containing two or more oxygen atoms in addition to the (meth)acryloyloxy group and the (meth)acryloyl group;
• wherein the content of the monomer A is equal to or less than 25% by mass with respect to the total mass of the composition, and
• wherein a mol average glass transition temperature (Tg) of each of the monomer A and the monofunctional monomer B is equal to or greater than 45° C.