No, a chokuto is not a katana. The chokuto and katana are different types of swords with distinct characteristics and historical origins.

The chokuto is an ancient Japanese sword with a straight blade. It predates the development of the curved blades seen in later Japanese swords like the katana. The chokuto has a blade that remains straight from the hilt to the tip, lacking the curvature that characterizes the katana.

The katana, on the other hand, is a curved, single-edged sword that emerged during the feudal period in Japan. It became the primary battlefield weapon of the samurai class and is renowned for its cutting ability and cultural significance.

While the chokuto served as a precursor to the katana, they are distinct types of swords with different blade profiles and historical contexts. The chokuto is associated with an earlier era of Japanese sword development, while the katana is a later refinement of the traditional Japanese sword.

It's worth noting that the term "chokuto" is often used in modern times to describe straight swords used in various historical periods, but it does not refer to a specific type of sword that was commonly used during the time when the katana was prevalent.

In summary, the chokuto and katana are different types of swords. The chokuto has a straight blade, while the katana has a curved blade and is more widely recognized as a traditional Japanese sword.