Japanese Sword Arts FAQ Version 2.7
3. What about batto-jutsu, tameshi-giri, shinkendo and others?
Again, generally, batto-jutsu is another word for iaijutsu, tameshi-giri is the art of physically cutting with the sword and shinkendo is fencing from a real sword perspective. However, hundreds of years ago, the various sword teachers called their arts by various names which all designated more or less complete curricula of sword technique. In other words, what one ryu called kendo (or iaijutsu, or kenjutsu, or batto-jutsu) in the 15th century is not the same as what we call kendo today - it would have incorporated techniques of fencing, drawing and cutting, as no swordsman would be sufficiently trained without all three skills.
Shinkendo today generally refers to Obata Toshishiro's system of swordsmanship.
3a. OK, so if they're watered down, why study kendo or iaido?
Studying swordsmanship in the late 20th century is not a practical matter. Unlike the various empty-handed arts, there is no direct application for self-defence. You are unlikely to whip out a katana or bokken when accosted in a dark alley. People start the study of swordsmanship for a variety of reasons. Those who study for a long time end up staying for two reasons: they enjoy the practice, and they feel they improve themselves through their practice. These things can be accomplished through kendo and iaido, in fact some might say they are more readily accomplished through the do forms, as that is their intent. Note that just because an art is labelled jutsu does not mean that there is no spiritual side to the training; that is a distinction that separates the most extreme sides to each style. If your interest is in accurate and realistic sword technique applications, then you may not be satisfied with kendo or iaido. Be aware that qualified instructors of kenjutsu or iaijutsu are extremely difficult to find. There are only a handful in North America, and a whole passle of charlatans. Even the handful that are generally considered legitimate, including Lovret and Obata, have their detractors.