Straight to the point, Lampard endured his first defeat as Chelsea supervisor as Kawasaki Frontale scored late to grab triumph in Yokohama.
Leandro Damiao headed in at the back post as the hosts exploited an uncommon chance, jumping on a guarded error from David Luiz to seal a far-fetched pre-season win.
On a generally disillusioning evening for Chelsea, Christian Pulisic made his introduction as a second-half substitute.
Allowed an all-inclusive summer break following the Copa America, Pulisic was named among the substitutes in the wake of joining the visit late and was tossed on instead of Mason Mount in the subsequent half.
That was the feature in a generally unsuitable presentation from Chelsea, who were lifted by the presentation of Ross Barkley at the interim yet at the same time neglected to discover the leap forward at the Nissan Stadium.
Barkley carved out their best two chances of the match, first finding Mount who sent a curling strike just past the far post before Kenedy steered another through pass narrowly wide.
Olivier Giroud, on for Michy Batshuayi after his latest failed audition, drew a smart save from a free-kick and then headed into the goalkeeper’s palms before Damiao struck late to clinch victory.