The number 100 is expressed as “ひゃく hyaku” However, when we reach 300, it is represented as “さんびゃく san byaku” and when we reach 600, it becomes “ろっぴゃく roppyaku”. Similarly, for 800, it is expressed as “はっぴゃく happyaku.”

The unit for the number 1000 is “せん sen” . However, when referring specifically to the number 1000, it can also be expressed as either “せんsen” or “いっせん issen.”

For the numbers 3000 and 8000, the Japanese readings are “さんぜん san zen” and “はっせん ha ssen,” respectively.
A unit called “man” (まん) is used, which is not present in Western languages. For instance, while in English we say “ten thousand” for 10000, in Japanese, it is simply expressed as “1 まん.”