Williams left Japan first in the D1 constructors' standings on 325 points, 13 ahead of VCARB on 312.
Demaiko finished second from pole for Williams, behind cloud's P3-to-P1 McLaren recovery and ahead of Sammy278's Ferrari.
Second place carries the team lead
Williams did not win the D1 race, but demaiko's runner-up result was enough to put the team first in the cumulative constructors' table.
The drivers' standings move in the opposite direction: cloud and Tratracer23 leave Japan level on 156 points, with cloud listed first.
Thirteen points in one table, zero in the other
Williams owns a 13-point constructors' cushion while the leading drivers are separated only by order at equal totals. The same race creates clarity for teams and ambiguity for drivers.
Japan's D1 result is therefore best read across both tables: McLaren wins the race, Williams takes the team lead and the drivers' championship reaches 156-156.
