Bring a large pot of water to a boil. Add the soba noodles and cook according to the package instructions. Drain noodles and rinse with cold water until the noodles are cold. Drizzle the noodles with a tablespoon of sesame oil and rub it in, so the noodles won't stick together.
While the noodles are cooking, spiralize a cucumber. If you do not have a spiraliizer, just cut the cucumber into long, thin strips. Place the cucumber on a plate lined with paper towels. Sprinkle a pinch of salt and let it sit for 5 minutes. This will help release the extra water.
Chop the cilantro and green onions. Set aside.
In a small bowl, add all ingredients for the sesame ginger dressing. Whisk until well combined.
Add the noodles to a large bowl. Use your hands to squeeze out any additional water from the cucumbers, then add them to the bowl. Add the dressing and toss until well combined.
Top with green onions, cilantro, and sesame seeds. Enjoy! If everything isn't eaten, store leftover noodles in a sealed container in the fridge. Leftovers will last for one week.