The Shinzou Yaburi no Saka [Literally: Heart Break Hill] (心臓破りの坂) was an obstacle used in Kinniku Banzuke's Hand Walk event and later the SASUKE 21 Trials. There were two different versions of this obstacle.
Hand Walk Version
The original version of the obstacle was used in the first incarnation Hand Walk event in Banzuke. It was placed as the seventh obstacle and its function was simple. The competitor must simply walk up a steep slope, but on their hands (As this was the rule for the entire event). The obstacle eliminated almost every competitor to attempt it.
SASUKE 21 Trials Version
The second version of the obstacle was used for the SASUKE Trials. Instead of a hand-walking slope, competitors instead had to run up a giant slope that flattened out about 2/3 of the way up before slanting upwards again. Unlike the previous version, this obstacle was much easier in comparison (Most likely due to the fact that competiors could use their legs, not their hands).