diff --git a/include/mcl/bn.h b/include/mcl/bn.h
index 1396d6b..d553066 100644
--- a/include/mcl/bn.h
+++ b/include/mcl/bn.h
@@ -206,33 +206,6 @@ MCLBN_DLL_API int mclBn_getETHserialization(void);
 */
 MCLBN_DLL_API int mclBn_setMapToMode(int mode);
 
-/*
-	the next three functions are auxiliary of the new eth 2.0 spec
-	these always return 0 if MCL_BLS12_381 is set
-*/
-/*
-	set out to hash of (msg[msgSize], ctr, dst[dstSize])
-	return 0 if success
-	@note append zero byte to msg if necessary
-*/
-// deprecated
-MCLBN_DLL_API int mclBn_ethMsgToFp2(mclBnFp2 *out, const void *msg, size_t msgSize, uint8_t ctr, const void *dst, size_t dstSize);
-
-/*
-	set out to hash of (t1, t2)
-	allow t2 is NULL
-	return 0 if success
-*/
-MCLBN_DLL_API int mclBn_ethFp2ToG2(mclBnG2 *out, const mclBnFp2 *t1, const mclBnFp2 *t2);
-
-/*
-	set out to hash of (msg[msgSize], dst[dstSize])
-	@note append zero byte to msg if necessary
-	return 0 if success
-*/
-// deprecated
-MCLBN_DLL_API int mclBn_ethMsgToG2(mclBnG2 *out, const void *msg, size_t msgSize, const void *dst, size_t dstSize);
-
 ////////////////////////////////////////////////
 /*
 	deserialize
diff --git a/include/mcl/bn.hpp b/include/mcl/bn.hpp
index 13e43e9..427ddf3 100644
--- a/include/mcl/bn.hpp
+++ b/include/mcl/bn.hpp
@@ -2173,39 +2173,6 @@ inline const G1& getG1basePoint()
 	return BN::param.basePoint;
 }
 
-inline const Fr& getG2cofactorAdj()
-{
-	return BN::param.mapTo.g2cofactorAdj_;
-}
-
-inline const Fr& getG2cofactorAdjInv()
-{
-	return BN::param.mapTo.g2cofactorAdjInv_;
-}
-
-// deprecated
-inline bool ethMsgToFp2(Fp2& out, const void *msg, size_t msgSize, uint8_t ctr, const void *dst, size_t dstSize)
-{
-	if (!BN::param.isBLS12) return false;
-	hashToFp2old(out, msg, msgSize, ctr, dst, dstSize);
-	return true;
-}
-
-inline bool ethFp2ToG2(G2& out, const Fp2& t1, const Fp2 *t2 = 0)
-{
-	if (!BN::param.isBLS12) return false;
-	BN::param.mapTo.mapTo_WB19_.opt_swu2_map(out, t1, t2);
-	return true;
-}
-
-// deprecated
-inline bool ethMsgToG2(G2& out, const void *msg, size_t msgSize, const void *dst, size_t dstSize)
-{
-	if (!BN::param.isBLS12) return false;
-	BN::param.mapTo.mapTo_WB19_.map2curve_osswu2(out, msg, msgSize, dst, dstSize);
-	return true;
-}
-
 } } // mcl::bn
 
 namespace mcl { namespace local {
diff --git a/include/mcl/impl/bn_c_impl.hpp b/include/mcl/impl/bn_c_impl.hpp
index 1cca838..cf0b547 100644
--- a/include/mcl/impl/bn_c_impl.hpp
+++ b/include/mcl/impl/bn_c_impl.hpp
@@ -135,21 +135,6 @@ int mclBn_setMapToMode(int mode)
 	return setMapToMode(mode) ? 0 : -1;
 }
 
-int mclBn_ethMsgToFp2(mclBnFp2 *out, const void *msg, size_t msgSize, uint8_t ctr, const void *dst, size_t dstSize)
-{
-	return mcl::bn::ethMsgToFp2(*cast(out), msg, msgSize, ctr, dst, dstSize) ? 0 : -1;
-}
-
-int mclBn_ethFp2ToG2(mclBnG2 *out, const mclBnFp2 *t1, const mclBnFp2 *t2)
-{
-	return mcl::bn::ethFp2ToG2(*cast(out), *cast(t1), cast(t2)) ? 0 : -1;
-}
-
-int mclBn_ethMsgToG2(mclBnG2 *out, const void *msg, size_t msgSize, const void *dst, size_t dstSize)
-{
-	return mcl::bn::ethMsgToG2(*cast(out), msg, msgSize, dst, dstSize) ? 0 : -1;
-}
-
 ////////////////////////////////////////////////
 // set zero
 void mclBnFr_clear(mclBnFr *x)
diff --git a/readme.md b/readme.md
index c1b1b56..1762e11 100644
--- a/readme.md
+++ b/readme.md
@@ -10,6 +10,7 @@ mcl is a library for pairing-based cryptography,
 which supports the optimal Ate pairing over BN curves and BLS12-381 curves.
 
 # News
+- `mclBn_eth*` functions are removed.
 - `mcl::bn::mapToG1(G1& out, const Fp& v)` supports `BLS12_MAP_FP_TO_G1` in [EIP 2537](https://eips.ethereum.org/EIPS/eip-2537).
 - `mcl::bn::hashAndMapToG1(G1& out, const void *msg, size_t msgSize)` supports ([hash-to-curve-09 BLS12381G1_XMD:SHA-256_SSWU_RO_](https://www.ietf.org/id/draft-irtf-cfrg-hash-to-curve-09.html#name-bls12381g1_xmdsha-256_sswu_))
 - `MCL_MAP_TO_MODE_HASH_TO_CURVE_07` is added for [hash-to-curve-draft-07](https://datatracker.ietf.org/doc/draft-irtf-cfrg-hash-to-curve/07/).
diff --git a/test/mapto_wb19_test.cpp b/test/mapto_wb19_test.cpp
index 7cd6b2d..c40c129 100644
--- a/test/mapto_wb19_test.cpp
+++ b/test/mapto_wb19_test.cpp
@@ -244,31 +244,6 @@ void iso3Test(const T& mapto)
 	CYBOZU_TEST_EQUAL(Q1, Q2);
 }
 
-void testVec(const char *file)
-{
-	std::ifstream ifs(file);
-	if (!ifs) {
-		printf("skip testVec because `%s` is not found\n", file);
-	}
-	printf("testVec %s\n", file);
-	Fp2 t1, t2;
-	G2 out, P;
-	std::string s;
-	for (;;) {
-		ifs >> s;
-		if (s != "t1") break;
-		ifs >> t1;
-		ifs >> s;
-		CYBOZU_TEST_EQUAL(s, "t2");
-		ifs >> t2;
-		ifs >> s;
-		CYBOZU_TEST_EQUAL(s, "out");
-		ifs >> out.x >> out.y >> out.z;
-		ethFp2ToG2(P, t1, &t2);
-		CYBOZU_TEST_EQUAL(P, out);
-	}
-}
-
 template<class T>
 void testHashToFp2v7(const T& mapto)
 {