Combine 1 tablespoon of the soy sauce and brown sugar in a small bowl. Mix until the sugar has dissolved. Set it aside for later. Heat a large pan over medium heat. Pour in the vegetable oil. Add the spam into the pan and arrange the pieces in a single layer. Cook to spam for about 3-4 minutes until the spam has crisped and browned on all sides.
Reduce the heat to medium low then pour in the soy sauce and brown sugar mixture. Mix the sauce with the spam and continue to cook for 1-2 minutes until the spam has caramelized. Remove the spam from the pan and set it aside for later.
Wipe the pan out with a paper towel. Heat it over medium heat and add in the butter. Once the butter has melted, add in the onion. Sauté for about 3 minutes until translucent. Mix in the white parts of the green onion and garlic. Cook for another minute. Add in the kimchi and gochujang and cook for 2 minutes. Increase the heat to medium high then add in the rice. Break the clumps of rice apart and mix until the grains are evenly combined with the kimchi. Mix in the remaining 1 tablespoon of soy sauce, gochugaru, sesame oil, and salt.
Continue to cook for 2-3 minutes until the rice is heated through and gets slightly crisp on the bottom. Remove the pan from heat. Top with a sprinkle of furikake or crushed roasted seaweed and a fried egg. Garnish with the green parts of the green onion. Enjoy!