The Murata was Japan's first domestic manufactured military rifle. In its first iteration, it was an 11mm, single shot, black powder weapon and was adopted in 1880 (the Type 13). Before long, some problems in the design were discovered, and the Winchester company helped to resolve them. Winchester tooling was purchased by the Japanese government, and the improved Type 18 rifle was brought into service in 1885. A further and more significant modification would follow 4 years later as the Type 22. That iteration was reduced to an 8mm bore, and had a tubular magazine added - it would serve the Imperial Japanese military until the first Arisakas went into production.