I designed it personally,” SoftBank founder Masayoshi Son tells TIME in an exclusive interview, gazing at the sweeping vista dominated by Edo-period imperial gardens. They may be digs that hark back to a bygone era,

Son has done this before — and left $150 billion on the table. He did it again anyway. Here is the stack logic that makes this more than just a contrarian bet.

The company's latest funding round valued it at $840 billion, as Big Tech and Masayoshi Son's Softbank joined its blockbuster $110 billion round