In a medium bowl, combine 1/4 cup of the sake, 1/4 cup of the soy sauce, the ginger, garlic sambal oelek and sesame oil. Whisk until combined, now add the salmon and gently toss. Allow the salmon to sit in the marinade for 10-30 minutes.
Meanwhile cook the soba noodle according to package directions, draining and then rinsing with cold water to stop the cooking.
Heat about a tablespoon of sesame oil in a wok or high sided skillet over high heat. Remove the salmon from the marinade, reserving the marinade for later. Cook the salmon, turning for 2-3 minutes until just cooked and lightly caramelized. Be careful when turing the salmon as it is delicate. Remove and repeat with the remaining salmon.
Add another tablespoon of oil to the wok. Add the green onions and stir fry for 2 minutes . Add the 1/4 cup sake, broccolini, edamame and the reserve marinade. Cook, stirring, for 3-5 minutes until liquid has reduced slightly. Add the remaining 1/4 cup of sake and remaining 2 tablespoons of soy sauce. Toss the soba noodles, along with the salmon and all of the juices from the salmon, into the wok. Toss well, cook another 3-4 minutes or until warmed throughout and the sauce has thickened. Serve with sesame seeds and cashews.