90秒で分かる「たくさん」はなぜ「沢」と「山」?

沢山(たくさん)って「いっぱいある」という意味ですが、なぜこんな漢字なんでしょう?沢山の語源を90秒でサクッと理解しちゃいましょう!
Learn about Japanese Senkohanabi (Sparklers) in 90 seconds Learn about Japanese Senkohanabi (Sparklers) in 90 seconds
Learn the difference between eye fatigue and eyestrain in 90 seconds Learn the difference between eye fatigue and eyestrain in 90 seconds
Understand what an elevator pitch is in 90 seconds Understand what an elevator pitch is in 90 seconds
Learn how to do shoko (incense offering) in 90 sec Learn how to do shoko (incense offering) in 90 sec