Complex sentence: For a period of eight years the denomination was replaced by banknotes and the Japanese Military Yen, but when introduced again in 1949 it had the same specifications as the last issue, but was minted in nickel-brass.
Split into simpler sentences: For a period of eight years the denomination was replaced by banknotes and the Japanese military yen. When reintroduced in 1949, it had the same specifications as the last issue, but was minted in nickel-brass.