On September 18, 1984, Japan’s Supreme Court decided a case about a condominium unit. A dentist who wanted to buy it raised the question of its electrical capacity. The seller changed the design and built it that way. The buyer then did not sign.
The court held that the buyer had breached a duty of care under the principle of good faith at the preparatory stage of the contract. He had to pay the seller’s damages. Because of shared fault, the damages were cut by half.