- PIE, pizza contest. Barrie, Ontario Canada
- "Let 'Em EAT" authentic woodfired pizza restaurant
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- 2011/08
- "The Legend Returns, Let 'Em Eat" First place (43 slices in 12mins)
-
- 2010/08
- First place (40 slices in 12 mins)

- JULY 4TH. 230 5th Rooftop Bar (hosted by Steven Greenberg)
- NYC, USA
-
- 2011/07
- World Record (69 hotdogs in 10 mins)

- The West Coast Hot Dog Eating Championship @ The Derby
- Mission Viejo, Ca USA
-
- 2011/09
- First place (49 hot dogs in 10mins)

- Kobayashi Presents The Gringo Bandito Taco Challenge
- Huntington Beach, Ca USA
-
- 2011/08
- First place (81 soft tacos in 10mins)

- Nathan's Hot Dog Eating Contest
- Kobayashi was the Nathan's Hot Dog Eating Contest winner for an unprecedented six years in a row.
Matches from 2008 and on were 10 minutes instead of 12 minutes.
-
- 2009
- Second place (64.5 hot dogs)
-
- 2008
- Second place (59 hot dogs) (lost tie-breaker)
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- 2007
- Second place (63 hot dogs - new record)
-
- 2006
- First place (53.75 hot dogs - new record)
-
- 2005
- First place (49 hot dogs)
-
- 2004
- First place (53.5 hot dogs - new record)
-
- 2003
- First place (44.5 hot dogs)
-
- 2002
- First place (50.5 hot dogs)
-
- 2001
- First place (50 hot dogs)

- Glutton Bowl
- Kobayashi ate 31 hot-dogs in the hot dog eating round, putting him into the finals. For the final round of the Glutton Bowl,
the contestants had to eat a bowl of brains. Kobayashi won with a finished plate, of 55 cow brains.
-
- 2001
- Glutton Bowl Hot Dog Champion (31 Hot Dogs)
-
- 2001
- Glutton Bowl Main Event Champion (55 Cow brains)

- Krystal Square Off
- Kobayashi was also the reigning champion of the Krystal Square Off World Hamburger Eating Championship until 2007,
when he could not compete due to a recent wisdom tooth extraction. He regained the champion belt in 2009.
-
- 2009
- First place (93 hamburgers)
-
- 2008
- Third place (84 hamburgers)
-
- 2006
- First place (97 hamburgers)
-
- 2005
- First place (67 hamburgers)
-
- 2004
- First place (69 hamburgers)

- CP Biggest Eater Competition 2010 Singapore
- Second place

- Pizza Hut P'zone Chow-lenge
- First place
-
- 2009
- 5 1lb. 3 / 4 p'zones/6min

- Major League Eating Singapore Chicken Satay Contest
- First place

- Taiwan Lamb Pot Eating Contest
- First place : world record

- The Golden Palace.net Lobster Roll Eating Challenge
- First place
-
- 2006
- 41 lobster rolls / 10min

- The Johnson World Brat Eating Championship
- First place
-
- 2006
- 58 brat sausages / 10min

- USA ESPN "US OPEN"
- First place
