Intricate pop maestro Shugo Tokumaru and instrument inventor / oddball pop act (and sometimes robot wedding organizer) Maywa Denki have been running in the same circles for the last few years, including playing together at last year’s Tonofon Festival. They are a natural pair — both use less-than-common tools to create dizzying songs. So now they come together on “Vektor,” a galloping number where Tokumaru’s usual magical-pop-realism gets an extra boost from Maywa Denki’s assortment of homemade instruments. Listen above.