Islamic bow for I.D. and comment

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Originally Posted by Timo Nieminen

The tachi was still in use as a cavalry sword. For example, in this picture of the Siege of Osaka Castle, 1615:

As late as the Satsuma Rebellion, art still shows traditionally-equipped armoured cavalry wearing tachi .

Just because a sword was worn in the manner of a tachi does not necessarily make the sword a true "tachi".

There were true tachi, which are swords made during a certain period of time and with certain identifiable traits.

There were swords that were not true tachi which were mounted in a tachi koshirae.

There were swords that were not true tachi and were not mounted in a tachi koshirae but were still worn in the manner of a tachi.

There were swords made at a later date than true tachi which were made to look like true tachi.