What is the difference between 刹那主義 and 快楽主義?


The dictionary says that 刹那主義 means "principle of living only for the moment"
and 快楽主義 means "hedonism/epicureanism", but I also found entries that say
epicureanism for the former. I don't think they are interchangeable, but I
can't seem to grasp their nuance very well. I found these words in a
character's profile and this how his description starts (刹那主義,快楽主義).  
  
Calling the character just hedonistic would be accurate given his personality,
but, does it sound alright if I translate as "A hedonist who lives for the
pleasure of the moment"?




If what you want to say by the word
"[hedonism](https://dictionary.cambridge.org/dictionary/english/hedonism)" is:

> living and behaving in ways that mean you get as much pleasure out of life
> as possible, according to the belief that the most important thing in life
> is to enjoy yourself

then you understand both words correctly. "Epicureanism" as an English word is
a popularized metaphor which is often not even true to the philosophy Epicurus
himself had advocated, not to mention translation. (The "real" epicureanism as
an ancient Greek philosophy is called エピクロス主義.)

> _does it sound alright if I translate as "A hedonist who lives for the
> pleasure of the moment"?_

Yes, you are right about this interpretation of 刹那主義, because, as [the
dictionary](https://dictionary.goo.ne.jp/word/%E5%88%B9%E9%82%A3%E4%B8%BB%E7%BE%A9/)
says:

> 過去や将来のことを考えないで、ただ現在の瞬間を充実させて生きればよいとする考え方。 **また、一時的な快楽を求めようとする考え方。**




If what you want to say by the word
"[hedonism](https://dictionary.cambridge.org/dictionary/english/hedonism)" is:

> living and behaving in ways that mean you get as much pleasure out of life
> as possible, according to the belief that the most important thing in life
> is to enjoy yourself

then you understand both words correctly. "Epicureanism" as an English word is
a popularized metaphor which is often not even true to the philosophy Epicurus
himself had advocated, not to mention translation. (The "real" epicureanism as
an ancient Greek philosophy is called エピクロス主義.)

> _does it sound alright if I translate as "A hedonist who lives for the
> pleasure of the moment"?_

Yes, you are right about this interpretation of 刹那主義, because, as [the
dictionary](https://dictionary.goo.ne.jp/word/%E5%88%B9%E9%82%A3%E4%B8%BB%E7%BE%A9/)
says:

> 過去や将来のことを考えないで、ただ現在の瞬間を充実させて生きればよいとする考え方。 **また、一時的な快楽を求めようとする考え方。**

