Good recovery without decompression fasciotomy for crush syndrome caused by using a Japanese-style toilet.

We report a case of crush syndrome that developed while the patient was squatting to use a Japanese-style toilet. The patient was a 61-year-old male with an obese body. He was sitting on the toilet and couldn't stand up, and after a few hours, the landlord found him and called the emergency services. On presentation, the patient was hyperkalemic and in shock, and his serum creatine kinase levels rose to a maximum of 287,600 U/L. He was diagnosed with postural crush syndrome in both lower extremities due to squatting position in a Japanese-style toilet. Subjective symptoms, physical examination, and blood tests were monitored and the patient was observed. As a result, the patient could be treated conservatively without fasciotomy. Dialysis was not necessary because the fluid infusion maintained adequate urine output and corrected the hyperkalemia. Magnetic resonance imaging of both lower extremities showed multiple high-signal areas in the muscles of the bilateral thighs and lower legs. This case suggested that if the wound is closed, the peripheral pulse is palpable, and the patient's symptoms have improved, a fasciotomy should not be performed. People who are too heavy to squat may need to be careful when using this kind of toilet.