Japan - onshore - Hokkaido - EPSG:6700

WKT

HVCOORDSYS["HVC_Tokyo_and_JSLD72_height", 
	GEOGCS["GCS_Tokyo", 
		DATUM["D_Tokyo", 
			SPHEROID["Bessel_1841", 6377397.155, 299.1528128]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	VERTCS["JSLD72_height", 
		VDATUM["Japanese_Standard_Levelling_Datum_1972"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["HVC_Tokyo_and_JSLD72_height", 
	GEOGCRS["GCS_Tokyo", 
		DATUM["D_Tokyo", 
			ELLIPSOID["Bessel_1841", 6377397.155, 299.1528128]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	VERTCRS["JSLD72_height", 
		VDATUM["Japanese_Standard_Levelling_Datum_1972"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "6700"]]

Data from @esri/proj-codes

{
  "wkid": 6700,
  "latestWkid": 6700,
  "pcsWkid": 0,
  "gcsWkid": 4301,
  "vcsWkid": 6693,
  "macro": "PE_HVC_TOKYO_JSLD72_HT",
  "name": "HVC_Tokyo_and_JSLD72_height",
  "wkt": "HVCOORDSYS[\"HVC_Tokyo_and_JSLD72_height\",GEOGCS[\"GCS_Tokyo\",DATUM[\"D_Tokyo\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],VERTCS[\"JSLD72_height\",VDATUM[\"Japanese_Standard_Levelling_Datum_1972\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"HVC_Tokyo_and_JSLD72_height\",GEOGCRS[\"GCS_Tokyo\",DATUM[\"D_Tokyo\",ELLIPSOID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],VERTCRS[\"JSLD72_height\",VDATUM[\"Japanese_Standard_Levelling_Datum_1972\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"6700\"]]",
  "description": "Japan - onshore - Hokkaido",
  "authority": "EPSG",
  "version": "8.4(10.8.0)",
  "deprecated": "no",
  "areaname": "Japan - onshore - Hokkaido",
  "extent": {
    "slat": 41.34,
    "nlat": 45.54,
    "llon": 139.7,
    "rlon": 145.87
  }
}