My Japanese friend said "My 生き甲斐 is travel". She was unfamiliar with the Venn diagram, for her she would directly translate it as "passion".
Turns out the Venn diagram relation is from a random 2014 blog post. He just found a Venn diagram online and replaced the word "purpose" with "ikigai":
I've talked to a number of Japanese people about Ikigai, and they either didn't know about the Venn diagram, or thought it misrepresented the concept. It's the modern-day equivalent of "the Chinese word for crisis" [0]. But now it's unstoppable—I'm sure you can find pillows on Etsy with the diagram.
Turns out the Venn diagram relation is from a random 2014 blog post. He just found a Venn diagram online and replaced the word "purpose" with "ikigai":
http://theviewinside.wpengine.com/meme-seeding/