Japan - onshore and offshore - EPSG:7414

WKT

HVCOORDSYS["HVC_Tokyo_and_JSLD_Height", 
	GEOGCS["GCS_Tokyo", 
		DATUM["D_Tokyo", 
			SPHEROID["Bessel_1841", 6377397.155, 299.1528128]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	VERTCS["Japanese_Standard_Levelling_Datum_1969", 
		VDATUM["Japanese_Standard_Levelling_Datum_1969"], 
		PARAMETER["Vertical_Shift", 0.0], 
		PARAMETER["Direction", 1.0], 
		UNIT["Meter", 1.0]]]

WKT2

COMPOUNDCRS["HVC_Tokyo_and_JSLD_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["Japanese_Standard_Levelling_Datum_1969", 
		VDATUM["Japanese_Standard_Levelling_Datum_1969"], 
		CS[vertical, 1], 
		AXIS["Gravity-related height (H)", up, 
			LENGTHUNIT["Meter", 1.0]]], 
	ID["EPSG", "7414"]]

Data from @esri/proj-codes

{
  "wkid": 7414,
  "latestWkid": 7414,
  "pcsWkid": 0,
  "gcsWkid": 4301,
  "vcsWkid": 5723,
  "macro": "PE_HVC_TOKYO_AND_JSLD_HEIGHT",
  "name": "HVC_Tokyo_and_JSLD_Height",
  "wkt": "HVCOORDSYS[\"HVC_Tokyo_and_JSLD_Height\",GEOGCS[\"GCS_Tokyo\",DATUM[\"D_Tokyo\",SPHEROID[\"Bessel_1841\",6377397.155,299.1528128]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],VERTCS[\"Japanese_Standard_Levelling_Datum_1969\",VDATUM[\"Japanese_Standard_Levelling_Datum_1969\"],PARAMETER[\"Vertical_Shift\",0.0],PARAMETER[\"Direction\",1.0],UNIT[\"Meter\",1.0]]]",
  "wkt2": "COMPOUNDCRS[\"HVC_Tokyo_and_JSLD_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[\"Japanese_Standard_Levelling_Datum_1969\",VDATUM[\"Japanese_Standard_Levelling_Datum_1969\"],CS[vertical,1],AXIS[\"Gravity-related height (H)\",up,LENGTHUNIT[\"Meter\",1.0]]],ID[\"EPSG\",\"7414\"]]",
  "description": "Japan - onshore and offshore",
  "authority": "EPSG",
  "version": "6.15(10.0.0)",
  "deprecated": "no",
  "areaname": "Japan - onshore mainland",
  "extent": {
    "slat": 30.94,
    "nlat": 45.54,
    "llon": 129.3,
    "rlon": 145.87
  }
}