Umi-Sen Ken

The Umi-Sen Ken (海千拳), translated as 1000 Seas Path was one of two secret and deadly styles of martial arts that Genma Saotome developed when he was younger, the other being the Yama-Sen Ken. However both styles were so destructive that they were later sealed away.

Overview
While both styles used the analogy of the human body as a house, they were originally intended for robbery and burglary. The Umi-Sen Ken's techniques specifically simulated the silent entry of a burglar through the back door and emphasized "stealth", utilising swift techniques and masking the user's presence. Because of this emphasis it was more difficult to master than the Yama-Sen Ken. Its weakness was that when the user became emotional or angry, they could be brought out of their emotionless state and their presence revealed to an opponent

Genma taught Ranma the Umi-Sen Ken when Ryu Kumon arrived in Furinkan and by chance learned that Nodoka was a Saotome, as he was searching for the Umi-Sen Ken scroll. By becoming emotionless, Ranma could hide the "presence" which warns other martial artists of danger, and using extreme speed could sneak up on and attack them. Ranma tried to take Ryu on twice, but was defeated each time. Following the second defeat he demanded that Genma teach him the Umi-Sen Ken. Genma took his son into the Tendo Dojo and shut the door to prevent Soun and Akane from observing. Telling Ranma that he would only teach him how the Umi-Senken worked once, Genma masked his presence and hit him with the Haku Dato Shin Shō, knocking him out. Despite this, Ranma quickly ascertained how the Umi-Sen Ken functioned and began to train within the house, taking food, silverware and plates from the kitchen and putting them into Akane's drawers, stealing a section of newspaper that Soun was reading, and literally taking out the foundation of the living room while everyone else was having dinner. Although Akane saw him the first time he was in her room, Ranma improved and when he felt that he was ready, asked her to deliver a challenge letter and personal message to Ryu, who was staying at the Saotome home.

Techniques

 * Opening Move: the user takes a stance like that of a ghost, hands limp in front of their abdomen on slightly bent arms. The user then hides his 'presence'/battle aura from an opponent, limiting the effectiveness of the 'awareness' that warns many Ranma-verse martial artists of danger, or allows them to predict attacks, but remains fully discernible by any onlookers.


 * Gaito Retsuga Dan (鎧戸裂牙断, Armored Door Splitting Fang Judgment): A counter to the Yama-Sen Ken's "Welcome Gate Iron Fang Fingers"/Geimon Tessen Shi, by biting the attacker's hand.


 * Shichū Rakuchi Sei (支柱落地勢, Fulcrum Collapsing Force): Ranma falls to the ground while still biting the attacker's hand and then forces the opponent's legs open, unbalancing them briefly to set up for the next attack. Based on knocking loose floor braces without being caught by the resultant collapsing floor.


 * Haku Dato Shin Shō (白蛇吐信掌, White Snake Confessing Truth Palm): Multiple focused strikes towards the back, based on the concept of a sneak thief rapidly rummaging through drawers, capable of making Ryu dizzy for 1-2 seconds.


 * Goshin Ryūsei Fu (護身流星布, Self-Protection Meteor Cloth): A counter to the Yama-Sen Ken's backbreaking bearhug attack. Ranma wraps a star cloth around the adversary's head.


 * Rigyo Honshin (鯉魚翻身, Carp-Fish Flipping Body): After Goshin Ryūsei Fu, he flips out of the hold to move behind the latter.


 * Haizan Tōkai Tai (背山倒海態, High Mountain Inverted Sea Condition): After Rigyo Honshin, Ranma drives his feet into his rival's back while pulling down on the cloth, creating a strangling effect unless the cloth is ripped apart.


 * Goshin Dai Ryūsei Fu (護身大流星布, Self-Protection Great Meteor Cloth): Ranma whirls a furoshiki around his body, allowing him to quickly disappear from view.


 * Yasha Tankai Hō (夜叉探海包, Demon-Guardian Searching-Sea Wrap): Still under the effects of the Goshin Dai Ryūsei Fu, Ranma steals a Yama-Sen Ken user's clothing from behind, as well as those of nearby onlookers, and any debris created by the Kijin Raishū Dan vacuum blades. He wraps all of them inside the cloth, while simultaneously loosening all the soil around the latter with his feet. He then gains the Yama-Sen Ken user's attention and jumps from above, to provoke an attack. When the enemy unleashes his/her vacuum-blades the contents of the bag will absorb the brunt of the attack, while the void will cause a sucking effect on the soft dirt on all sides, wrapping and burying everything under the towel.