Yamamoto Keitaro (山本 桂太朗) is Unlimited Cliffer No. 5 and has competed twice on SASUKE. He holds the record of clearing Muscle Park in just under 26 seconds.
In the Trials at Muscle Park, he won a spot in SASUKE 20 and was the only cliffer to do so (even though Matsuda Tsuyoshi also competed in the tournament). During SASUKE 20, he made it through the first three obstacles and sized up the Jumping Spider only to fail after getting onto the walls.
He also competed in the SASUKE 21 Trials but timed out on the Sandbag Lift. He has also competed in the SASUKE 22 Trials and SASUKE 23 Trials, failing to complete the 800m race in time and failing to hold onto the bar the longest respectively.
It is confirmed that he competed on SASUKE 34 wearing 74. In the tournament, he cleared the first stage again, but failed the Reverse Conveyor. He has also competed in VIKING 2, failing the Cannonball.
|20||1942||Failed Jumping Spider (First Stage)|
|29||91||Failed Backstream (Second Stage)||Digest. Time Out.|
|34||74||Failed Reverse Conveyor (Second Stage)||Digest. Time Out.|
|2||19||Failed Cannonball (First Marine Stage)|