Not sure that this is a very controversial subject, it seems that many people inside the Takamatsuden aren't well versed in ground fighting although there are two jujutsu schools in the Bujinkan curriculum and perhaps more in the Genbukan. There are some very interesting sweeps, trips, chokes, and escapes from the normal positions as well. The biggest issue seems to be that since people spend a lot of time on the other myriad aspects of fighting found in these arts(weapons, striking, throwing, etc), they miss out on the wealth of information out there. There are a lot of supplementary and fundamental skills found in the ryutai undo and taihenjutsu as well that are related to ground fighting. A lot of the principles are the same as when restrained against a wall, accept that you are horizontal so you have to train a different orientation and get used to using your muscles and body accordingly. There are also many different sword drawing and weapons skills from compromised positions, but in general, all of these things seem to be taught randomly if at all. This has wrongly led some to believe that the Takamatsuden doesn't have much use when it comes to ground fighting. Another issue is that traditionally, ground fighting was not the major focus for battlefield warfare. By the time it had gone to the ground, it was usually the coup de grace(head count time) being delivered. So, the general consensus is that ground fighting is not the best choice for dealing with armed or multiple attackers. However, at the higher levels of these arts, are some people who spent a lot of time training in ground fighting so their opinion is based on experience and coming from a level of ability that many seem to lack. Takagi ryu is often considered a bodyguard school, so one would wonder why a bodyguard would not have the skills to subdue an opponent on the ground, especially as drawing weapons in the presence of one's liege would usually be inappropriate. So clearly, there is no need to run to outside sources to make up for a lack of jujutsu skills in the Takamatsuden, they are there, the question is whether or not you are learning them and training in them as diligently as many do the standup skills. Just to recap, all of these things are found in the Takamatsuden curriculum: Throws to pins and submission skills Escapes from being pinned, anti-submission skills Seated fighting skills(from seiza and fudoza primarily) Special chokes, sweeps, sacrifice throws, trips, and ukemi skills for standing and ground fighting Specialized weapon handling for when you are on the ground Supplemental exercises and calisthenics to develop one's body to be able to use the different techniques taught later Needless to say, just like with training realistically with weapons or standup skills, there is no magic pill that allows one to be invincible on the ground without a lot of hard training, testing, and being broken down time and again as one gets better. Just because there are a lot of valuable skills in the curriculum doesn't excuse one from doing the handwork themselves. Thoughts?