Alex de Angelis remains in a critical condition in a Japanese hospital following his crash, but he is "alert and conscious".
The Italian rider was airlifted to the Dokkyo University Hospital in Mibu on Saturday after he was involved in a high-speed accident during FP4 at Motegi, and he was initially diagnosed with rib and chest injuries as well as a lung contusion, but further scans revealed an intracranial hematom.
He once again spent Monday evening in the intensive care unit and his condition has improved.
A statement from his Iodaracing team read: "The clinical conditions of Alex De Angelis, admitted to the intensive care unit of the Dokkyo University Hospital (Mibu City) in Japan, following the tremendous fall in FP4 GP of Japan, are stable.
"de Angelis has spent the night well without any complications. There aren't any complications in the clinical picture of the San Marino rider, but his conditions are still critical due to the numerous back fractures and internal injuries, as pulmonary edema and intracranial one, both constantly monitored by the Japanese medical personnel in Mibu.
"From yesterday, De Angelis is not sedated, but is alert and conscious. In the coming days it will be repeated the CT scan to monitor intracranial hematoma that did not present changes from its appearance two days ago.
"The San Marino rider is constantly attended by the owner of Team e-motion Iodaracing, Giampiero Sacchi and from Clinica Mobile MD. Michele Zasa. The Alex De Angelis family are reaching the Dokkyo University Hospital in these hours."