Two very bright silent lights fly North to South over Tokyo.My wife called me out to our balcony, where we often watch stars, helicopters, jets, and airships. Our balcony provides a great view of the sky and we can always hear the jets and helicopters.The night was still, and clear.We could see two very bright, clear lights, to our eyes 30 centimeters apart (that is to say if you held a 30 centimeter ruler at arms length, that was the distance of the lights from our perspective) They flew one behind the other, the 2nd light a tiny bit to the left of the first, with no deviation of this formation. They were flying directly North to South. They were going dead straight at a steady speed, slower than helicopters that give city night flights, after 10 seconds they passed behind a all building and out of our sight. They were on a course that we have never seen flown by any other aircraft, heading out in the direction of the sea.The lights were remarkable, because they were absolutely silent. Even the jets at high altitude can be heard on our balcony.A few minutes later the Tokyo sky was filled with the usual 3 or four helicopters, and we could see 4 jets at varying altitudes passing over the city on the regular flight paths. After 30 minutes the sky had been covered with dappled clouds.Would love to know if any other reports cam from Tokyo this night, and what the lights were.