The Japanese 46 cm/45 Type 94 naval gun was a 46 cm (18.1 in) naval gun with the largest bore diameter of any gun ever mounted on a warship. Only two ships carried them, the Imperial Japanese Navy's World War II battleships Yamato and Musashi.

These guns were officially designated by the Japanese as "40 cm/45 Type 94" (15.9 inch) in an effort to hide their actual size, which was a closely-guarded secret until after the end of World War II. The Yamato is known to have fired at enemy ships on only one occasion.

2018年4月24日 · To comply with the Navy’s “gun-superiority” policy the earlier A-140 based units, at least 5 ships in total from Yamato to No. 797 would be re-gunned with twin 51cm/45 turrets on a one-on-one basis in place of the triple 46cm/45 turrets – essentially creating an Improved-Yamato class with all the sub variants brought up to similar ...

2009年3月19日 · Yamato's 460mm shells have a bigger penetrative performance against decks than Iowa's 406mm shells. The difference comes from the bigger weight of the Japanese shell (1460kg versus 1225kg). That's one difference. The second, more important, in my opinion, is the expected internal damage delivered by the shell.

Wikimedia Commons has media related to 460 mm artillery. The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes.

The 46 cm/45 (18.1") cannons used on the Yamato class were the most powerful guns ever installed on a battleship. While closely matched by the USA 16"/50 Mark 7 at long ranges, in a close-range engagement the penetration power of this weapon was unsurpassed.

The Japanese 46 cm/45 Type 94 naval gun (四十五口径九四式四〇糎砲, Yonjūgo-gōkei kyūyon-shiki yonjussenchi-hō) was a 46 cm (18.1 in) naval rifle, the largest ever mounted on a warship. Only two ships carried them, the Imperial Japanese …

2020年2月25日 · 大和级战列舰的主炮口径为18英寸（18英寸是457mm，大和级主炮实际口径为460mm），一个三联装炮塔重达2730吨，比一条当时的秋月级驱逐舰的满载排水量还要重。 巨大的460mm炮口里足足可以坐下一个日本水兵，可谓是名副其实的钢铁巨兽。 但是在巨兽之上，是否还天外有天，人外有人? 很遗憾，答案是否定的。 大和级的460mm舰炮确实是史上投入使用的最大舰炮。 但是纵观世界海军发展史，就再没有18英寸口径的舰炮了吗？ 有，但是寥寥无几。 …

English: The "40 cm/45 Type 94" were 46-cm naval guns mounted on Japanese battleships Yamato and Musashi in World War II. They were identified by Japan as 40-cm guns to mislead US intelligence. The following 17 files are in this category, out of 17 total.

This is a list of naval guns of all countries ordered by caliber.