The one-time South Korea coach has brought his side to the Club World Cup following an unprecedented Asian Champions League campaign that ended without a single defeat
The Horang-i went undefeated in their campaign's 12 matches, arriving to the champion's podium on the back of a seven-match winning streak.
"I'm very happy as we became the best team in Asia," Kim told MBC ESPN. "The players did their best for the pride of Korean football and the honour of Ulsan, so I thank them.
"This is the happiest day in my football life. I'm really thankful to the fans who supported us."
The hosts jumped to a 1-0 lead in the 13th minute via captain Kwak Tae-Hui's header before scoring two goals in the second half.
"We did what we had to do and what we could do best," Kwak said after the match. "Saudi players are skilled, but wecould stop them.
"We analyzed Al-Ahli with video footage, but confidence was key to win this match."
Al-Ahli failed to create a consistent threat throughout the match, and repeatedly paid for defensive lapses.
"We made many fouls and mistakes in the first half," coach Karel Jarolim said in his press conference. "After conceding, our players lost concentration. I tried to change the mood in the second half but the same thing happened.
"Kim Shin-Wook was a big problem for us. Ulsan were really strong so our players could not do much, but they worked hard."
Ulsan's players were already looking forward to December's Club World Cup, where a win against Monterrey on December 9 at Toyota Stadium will mean a match-up with European champions Chelsea.
"I have dreamed about playing against Chelsea," a victorious Kim Shin-Wook told reporters. "A match-up against John Terry would be interesting."