Lifespan, Longevity
In spring, your measurements will reveal your lifespan. Only in spring can you measure your lifespan, just as easily as you measure your height and weight.
On the first day of spring, all the girls and boys line up to measure their lifespans.
じゅ, す
ことぶき
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If your lifespan measurement isn't as long as you'd like, you need to drink more small juice (じゅ) boxes this year. They're good for your health, after all!
Look at Salmon, over here. She drank a thousand small juice boxes last year and now her measurement says she's gonna live another hundred years!