Saft offers a dire scenario that should give any possible foreign investor in Japan's government bond market pause:
At current very low interest rates - 10-year government bonds yield a paltry 1.0 percent - Japan has ample room for maneuver. Take that rate to 2.0 percent and Japan's annual interest bill doubles.Call that bold; call it counterintuitive. Call it 1+1=2.
(Many thanks to reader JM for putting the scenario into perspective for me.)