MASAYOSHI Son has found a new breed of believers: yield-hungry Asian investors.

SoftBank Group Corp has already issued US$7.9 billion of dollar-denominated bonds this year, but there's a key difference versus other offerings.

These notes are unique in that they cater specifically to Asian investors. The Japanese technology conglomerate's US$4.5 billion of perpetual securities, sold in July, are registered in Singapore and classed as Reg S, meaning SoftBank couldn't market them to money managers in the US. In 2013, when SoftBank first tapped the dollar bond market, its US$2.5 billion issue was 144A.