A thrifty or frugal person; someone who habitually economizes and avoids wasteful spending.
彼は有名な倹約家で、旅行でも無駄遣いをしない。
He is a well-known frugal person and doesn't waste money even when traveling.
子ども時代に倹約家の両親からお金の使い方を学んだ。
I learned how to handle money from my frugal parents during childhood.
倹約家の友人はセールを見逃さない。
My thrifty friend never misses a sale.