Combine first 6 ingredients in a small bowl; stir well with a whisk. Set aside.
Combine breadcrumbs and halibut in a large zip-top plastic bag. Seal and shake to coat; set aside.
Heat oil in a large nonstick skillet over medium heat. Add fillets; cook 4 minutes on each side or until halibut flakes easily when tested with a fork. Remove halibut from skillet; set aside, and keep warm.
Add teriyaki mixture to skillet. Bring to a boil; cook 1 minute, stirring constantly. Pour over halibut.