Two years later, Tomizawa qualified for his second Japanese team, as a 28-year-old, in the RS:X class at the 2012 Summer Olympics in London by finishing twenty-sixth and receiving a berth from the ISAF World Championships in Perth, Western Australia. Delivering a mediocre effort in the opening series, Tomizawa pulled off a fourth position to move him up in the overall rankings on the tenth leg, but came up short for the medal race with a net score of 209 points and a twenty-eighth-place finish in a fleet of thirty-eight windsurfers.