<?xml version="1.0" encoding="UTF-8"?>
<!-- (c) XBRL International.  See http://www.xbrl.org/legal -->
<schema targetNamespace="https://www.xbrl.or.jp/taxonomy/xbrl-gl-next/ehm" attributeFormDefault="unqualified" elementFormDefault="qualified"
  xmlns="http://www.w3.org/2001/XMLSchema"
  xmlns:xbrli="http://www.xbrl.org/2003/instance"
  xmlns:ehm="https://www.xbrl.or.jp/taxonomy/xbrl-gl-next/ehm"
  xmlns:gen="https://www.xbrl.or.jp/taxonomy/xbrl-gl-next/gen">
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <import namespace="https://www.xbrl.or.jp/taxonomy/xbrl-gl-next/gen" schemaLocation="../gen/gl-gen-2026-12-31.xsd"/>
  <!-- reusable OIM Attribute item type -->
  <complexType name="serialOrLotCodeItemType">
    <simpleContent>
      <restriction base="xbrli:tokenItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotDescriptionItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotNumberItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="nextSerialOrLotNumberItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotQuantityItemType">
    <simpleContent>
      <restriction base="xbrli:decimalItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotOriginalQuantityItemType">
    <simpleContent>
      <restriction base="xbrli:decimalItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotRemainingQuantityItemType">
    <simpleContent>
      <restriction base="xbrli:decimalItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotOriginationItemType">
    <simpleContent>
      <restriction base="xbrli:dateTimeItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotExpirationItemType">
    <simpleContent>
      <restriction base="xbrli:dateTimeItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotManufacturerItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotBatchDescriptionItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotWarrantyStartDateItemType">
    <simpleContent>
      <restriction base="xbrli:dateTimeItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotWarrantyEndDateItemType">
    <simpleContent>
      <restriction base="xbrli:dateTimeItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotWarrantyPeriodItemType">
    <simpleContent>
      <restriction base="xbrli:decimalItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotWarrantPeriodUnitItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="warrantyVendorItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="warrantyContractItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <complexType name="serialOrLotCommentItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType"/>
    </simpleContent>
  </complexType>
  <!-- reusable OIM Attribute item element -->
  <element name="serialOrLotCode" id="ehm_serialOrLotCode" type="ehm:serialOrLotCodeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotDescription" id="ehm_serialOrLotDescription" type="ehm:serialOrLotDescriptionItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotNumber" id="ehm_serialOrLotNumber" type="ehm:serialOrLotNumberItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="nextSerialOrLotNumber" id="ehm_nextSerialOrLotNumber" type="ehm:nextSerialOrLotNumberItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotQuantity" id="ehm_serialOrLotQuantity" type="ehm:serialOrLotQuantityItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotOriginalQuantity" id="ehm_serialOrLotOriginalQuantity" type="ehm:serialOrLotOriginalQuantityItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotRemainingQuantity" id="ehm_serialOrLotRemainingQuantity" type="ehm:serialOrLotRemainingQuantityItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotOrigination" id="ehm_serialOrLotOrigination" type="ehm:serialOrLotOriginationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotExpiration" id="ehm_serialOrLotExpiration" type="ehm:serialOrLotExpirationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotManufacturer" id="ehm_serialOrLotManufacturer" type="ehm:serialOrLotManufacturerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotBatchDescription" id="ehm_serialOrLotBatchDescription" type="ehm:serialOrLotBatchDescriptionItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotWarrantyStartDate" id="ehm_serialOrLotWarrantyStartDate" type="ehm:serialOrLotWarrantyStartDateItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotWarrantyEndDate" id="ehm_serialOrLotWarrantyEndDate" type="ehm:serialOrLotWarrantyEndDateItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotWarrantyPeriod" id="ehm_serialOrLotWarrantyPeriod" type="ehm:serialOrLotWarrantyPeriodItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotWarrantPeriodUnit" id="ehm_serialOrLotWarrantPeriodUnit" type="ehm:serialOrLotWarrantPeriodUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="warrantyVendor" id="ehm_warrantyVendor" type="ehm:warrantyVendorItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="warrantyContract" id="ehm_warrantyContract" type="ehm:warrantyContractItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <element name="serialOrLotComment" id="ehm_serialOrLotComment" type="ehm:serialOrLotCommentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <!-- reusable OIM Class primary-item anchor -->
  <element name="p_ehm_detailSerialOrLot" id="p_ehm_detailSerialOrLot" substitutionGroup="xbrli:item" type="xbrli:stringItemType" nillable="true" xbrli:periodType="instant"/>
</schema>
