feeling of bliss; sense of supreme happiness
A noun describing a deep, often momentary, feeling of perfect happiness or bliss. Used in both everyday and literary contexts.
I soaked in the hot spring and was filled with a feeling of bliss.
Seeing her smile fills my heart with a sense of bliss.
至福 is a noun meaning 'supreme bliss' itself, whereas 至福感 specifically refers to the feeling or sensation of that bliss.
Compound of 至福 (shifuku, 'supreme bliss') + 感 (kan, 'feeling, sensation'). The exact historical derivation is uncertain, but the components are transparent.