Place the water and agar in a small saucepan and bring to a boil. Reduce heat to medium-low and simmer, stirring occasionally, for 3 to 5 minutes until the agar has dissolved. Pour the hot liquid into a blender, add the matcha, and pulse several seconds until the matcha has dissolved.
Pour the matcha into a shallow, flat bottom dish and refrigerate until gelled. Mix all of the fruit and sea salt together in a serving bowl.
When the kanten has gelled, remove and sliced into 1 inch cubes. Gently toss kanten cubes in with the fruit salad and serve.
Per serving - 37 calories, 0 g fat (8% calories from fat), 1 g protein, 9 g carbohydrate, 2 g fiber, 0 mg cholesterol, 23 mg sodium