Coconut Rice: cook a batch on the stove, in a rice cooker, or instant pot.

Make ahi marinade: Add tamari, vinegar, sesame oil, honey, ginger, and half of the chopped scallions (reserve the rest for garnish at the end) to a bowl and mix to combine.

Prepare Ahi: Pat ahi dry with a paper towel, then use a very sharp knife to neatly cut into small, ½ inch cubes. Add to bowl with marinade and toss to coat. Refrigerate for 15 minutes to 1 hour.