If you want a sumo wrestler's autograph, why don't you go to Ryogoku?
The sumo wrestler kept patting down his bangs on our first date.
Ladies and gentlemen, thank you for attending today’s conference regarding the repeated misconduct of our sumo wrestlers.
A power samurai isn't a samurai at all. A Samurai's all about precision, after all. So, imagine someone that's a huge mass of muscle (and fat). This Japanese warrior is all about power... ramming into people as hard as they can to knock them over. This person is a sumo wrestler.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.