Soak the beef shank and beef tendon in cold water for at least 1 hour to remove blood.
Boil water in a pot, then add the prepared beef shank, beef tendon, green onion, ginger, and rice wine.
Simmer over medium-low heat for 2–3 hours until the meat becomes tender.
Remove the meat, let it cool, and slice it into bite-sized pieces.
Serve on a plate with dipping sauce (soy sauce, wasabi, vinegar, etc.).