Son of woman contacted authorities to report his mother missing day before discovery
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News from Saitama
Suspect said, 'I didn't do it'
Saitama police said, 'We are deeply sorry for the trouble'
Saitama superintendent said, 'We take it very seriously'
Girl said, 'I didn't have any money and wanted some'
Hama Sushi has announced it is considering pursuing a claim for damages
Caller to emergency services said, 'I slashed the care specialist's neck'
Targeted residence was previously burglarized in February
Suspect also hinted at his involvement in a wider criminal ring
Police arriving at the scene found the woman unharmed