Ultra-early excision has been widely used as a treatment strategy for extensive burns; however, it is not commonly used for non-extensive burns. Herein, we report a case of a flame burn in which satisfactory results were achieved by combining ultra-early excision with artificial dermis and negative pressure wound therapy (NPWT). A 66-year-old man with a history of lung cancer, renal cancer, and chronic renal failure attempted suicide by setting himself on fire. He was transferred to our hospital. He sustained 14% TBSA burns on his right trunk and left groin. Burn index was 12.5. On the second day post-injury, ultra-early excision was performed on the right trunk, and artificial dermis was applied and secured with NPWT. On the fourth day post-injury, a second operation was performed on the left groin, and total burn eschar removal was achieved. On the 18th day post-injury, we performed split-thickness skin grafting. The grafts took well, and the patient was transferred to another hospital on the 42nd day post-injury for rehabilitation. For non-extensive flame burns, a combination of ultra-early excision with artificial dermis and NPWT significantly reduced pain and medical resources required for treatment. We believe this approach is an effective treatment strategy for non-extensive flame burns and provides insights into the indications for ultra-early excision.

 Molten metal burns occur under special circumstances. We report a rare case of a burn caused by molten copper.
 The patient was 26-year-old man. While crafting at a university, molten copper splashed onto the back of his right hand. We diagnosed superficial or deep dermal burn due to the preserved sensation in the wound area. We administered conservative treatment, and the wound epithelialized after 28 days post-injury. There was no dysfunction observed in the affected hand.
 As molten metal is 200 to 1000℃ or higher, there is a high risk of deepening burn depth even if the contact time is slight. Molten metal burns present risks such as metal particles embedding in the skin, metal allergies, and steam explosions. Safety measures are implemented in workplaces; however, schools may lack adequate preventative measures. It is important to develop comprehensive safety manuals and provide thorough preventive education not only in workplaces but also in educational settings.

 Soft tissue necrosis at an STSG donor site caused by infection is uncommon. We report a case of 68-year-old female patient with 15% TBSA flame burns on the face, neck, chest, and left arm. We performed debridement on days 8 and 22, and skin grafting from both thighs at the time of the second operation. After surgery, soft tissue necrosis developed at the recipient and donor sites caused by infection. Antimicrobial therapy and additional debridement of necrotic tissue were performed, but the infection could not be controlled. The patient died of septic shock and MOF on day 57.
 Possible routes of transmission to donor site were contagion from burn wounds or hematogenous dissemination because of burn wound sepsis or catheter-related sepsis. To control the infection, it is necessary to debride necrotic tissue on both the recipient and donor sites.

 A 53-year-old male patient came into contact with a portion of a high-frequency melting furnace system at his workplace, resulting in electrical injuries to his back and hands. The entry point on his back was severely damaged, requiring wound bed preparation using Negative Pressure Wound Therapy. Subsequently, wound closure was achieved through split-thickness skin grafting. After discharge, he was able to resume the same duties as before the injury.
 A high-frequency melting furnace is a type of melting furnace that utilizes the self-heating of metal, which has become increasingly widespread in recent years. There are few reported cases of electrical shock from such furnaces. Herein, we report the circumstances surrounding this injury.

 Autologous cultured epidermis is essential for wound closure and lifesaving in patients with extensive burns. In Japan, the autologous cultured epidermis JACE^® was approved for marketing for extensive burns in 2007 and has been widely used for severe burn patients to date. JACE^® measures 8 cm x 10 cm per sheet. It is used for the treatment of deep dermal burns and deep burns covering 30% or more of the total body surface area. Herein, we report six cases of extensive burns treated at Japan Community Healthcare Organization Chukyo Hospital between January 2015 and September 2023. In these cases, wound closure was achieved using more than 51 sheets of JACE^®, resulting in life-saving outcomes. Our findings suggest the efficacy of JACE^® for saving the lives of patients with more extensive and deeper severe burns. Further studies are needed to investigate the potential of JACE^® to treat extensive severe burns.