Han aka ‘Asian like me’ makes japchae on video
Japchae originated in 17th century Korea. At the time, japchae was made with vegetables such as sliced cucumber, shredded daikon, and pyogo (shiitake) mushroom. Cellophane noodles were introduced in the 20th century.
One quick tip: Do not use baby spinach, if possible. No matter how briefly you cook it, it turns into a mess. Use more mature spinach, and chop it after cooking.