diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 2b9f4ef..c9faf55 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -22,6 +22,8 @@ set(FrameworkProtoFiles
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/framework/request.proto
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/framework/response.proto
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/diagnostics.proto
+        ${CMAKE_SOURCE_DIR}/src/tateyama/proto/core/request.proto
+        ${CMAKE_SOURCE_DIR}/src/tateyama/proto/core/response.proto
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/endpoint/request.proto
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/endpoint/response.proto
         ${CMAKE_SOURCE_DIR}/src/tateyama/proto/auth/request.proto
diff --git a/src/ogawayama/transport/transport.h b/src/ogawayama/transport/transport.h
index 0ae6fda..2591223 100644
--- a/src/ogawayama/transport/transport.h
+++ b/src/ogawayama/transport/transport.h
@@ -26,6 +26,8 @@
 #include <tateyama/utils/protobuf_utils.h>
 #include <tateyama/proto/framework/request.pb.h>
 #include <tateyama/proto/framework/response.pb.h>
+#include <tateyama/proto/core/request.pb.h>
+#include <tateyama/proto/core/response.pb.h>
 #include <tateyama/proto/endpoint/request.pb.h>
 #include <tateyama/proto/endpoint/response.pb.h>
 
@@ -45,13 +47,17 @@ constexpr static tateyama::common::wire::message_header::index_type OPT_INDEX =
 class transport {
     constexpr static std::size_t HEADER_MESSAGE_VERSION_MAJOR = 0;
     constexpr static std::size_t HEADER_MESSAGE_VERSION_MINOR = 0;
+    constexpr static std::size_t CORE_MESSAGE_VERSION_MAJOR = 0;
+    constexpr static std::size_t CORE_MESSAGE_VERSION_MINOR = 0;
     constexpr static std::size_t SQL_MESSAGE_VERSION_MAJOR = 1;
     constexpr static std::size_t SQL_MESSAGE_VERSION_MINOR = 0;
     constexpr static std::size_t ENDPOINT_MESSAGE_VERSION_MAJOR = 0;
     constexpr static std::size_t ENDPOINT_MESSAGE_VERSION_MINOR = 0;
+    constexpr static std::uint32_t SERVICE_ID_ROUTING = 0;  // from tateyama/framework/component_ids.h
     constexpr static std::uint32_t SERVICE_ID_ENDPOINT_BROKER = 1;  // from tateyama/framework/component_ids.h
     constexpr static std::uint32_t SERVICE_ID_SQL = 3;  // from tateyama/framework/component_ids.h
     constexpr static std::uint32_t SERVICE_ID_FDW = 4;  // from tateyama/framework/component_ids.h
+    constexpr static std::uint32_t MAX_EXPIRATION_TIME = (24 * 60 * 60 * 1000);
 
 public:
     transport() = delete;
@@ -70,6 +76,13 @@ class transport {
         if (handshake_response.value().result_case() != tateyama::proto::endpoint::response::Handshake::ResultCase::kSuccess) {
             throw std::runtime_error("handshake error");
         }
+        auto update_expiration_time_response = update_expiration_time();
+        if (!update_expiration_time_response) {
+            throw std::runtime_error("update_expiration_time error");
+        }
+        if (update_expiration_time_response.value().result_case() != tateyama::proto::core::response::UpdateExpirationTime::ResultCase::kSuccess) {
+            throw std::runtime_error("update_expiration_time error");
+        }
     }
 
 /**
@@ -323,6 +336,26 @@ class transport {
         return receive<T>(index);
     }
 
+    template <typename T>
+    std::optional<T> send(::tateyama::proto::core::request::Request& request, tateyama::common::wire::message_header::index_type index = 0) {
+        tateyama::proto::framework::request::Header fwrq_header{};
+        fwrq_header.set_service_message_version_major(HEADER_MESSAGE_VERSION_MAJOR);
+        fwrq_header.set_service_message_version_minor(HEADER_MESSAGE_VERSION_MINOR);
+        fwrq_header.set_service_id(SERVICE_ID_ROUTING);
+
+        std::stringstream sst{};
+        if(auto res = tateyama::utils::SerializeDelimitedToOstream(fwrq_header, std::addressof(sst)); ! res) {
+            return std::nullopt;
+        }
+        request.set_service_message_version_major(CORE_MESSAGE_VERSION_MAJOR);
+        request.set_service_message_version_minor(CORE_MESSAGE_VERSION_MINOR);
+        if(auto res = tateyama::utils::SerializeDelimitedToOstream(request, std::addressof(sst)); ! res) {
+            return std::nullopt;
+        }
+        wire_.write(sst.str(), index);
+        return receive<T>(index);
+    }
+
     template <typename T>
     std::optional<T> send(::tateyama::proto::endpoint::request::Request& request, tateyama::common::wire::message_header::index_type index = 0) {
         tateyama::proto::framework::request::Header fwrq_header{};
@@ -434,6 +467,16 @@ class transport {
         return send<tateyama::proto::endpoint::response::Handshake>(request);
     }
 
+    std::optional<tateyama::proto::core::response::UpdateExpirationTime> update_expiration_time() {
+        tateyama::proto::core::request::UpdateExpirationTime uet_request{};
+        uet_request.set_expiration_time(MAX_EXPIRATION_TIME);
+
+        tateyama::proto::core::request::Request request{};
+        *(request.mutable_update_expiration_time()) = uet_request;
+
+        return send<tateyama::proto::core::response::UpdateExpirationTime>(request);
+    }
+
     std::optional<std::string> receive(tateyama::common::wire::message_header::index_type index) {
         auto& response_wire = wire_.get_response_wire();
 
diff --git a/src/tateyama/proto/core/request.proto b/src/tateyama/proto/core/request.proto
new file mode 100644
index 0000000..4a44657
--- /dev/null
+++ b/src/tateyama/proto/core/request.proto
@@ -0,0 +1,56 @@
+syntax = "proto3";
+
+package tateyama.proto.core.request;
+
+option java_multiple_files = false;
+option java_package = "com.tsurugidb.core.proto";
+option java_outer_classname = "CoreRequest";
+
+// the request message to tateyama core service.
+message Request {
+    // service message version (major)
+    uint64 service_message_version_major = 1;
+
+    // service message version (minor)
+    uint64 service_message_version_minor = 2;
+
+    // reserved for system use
+    reserved 3 to 10;
+
+    // the request command.
+    oneof command {
+        // update session expiration time operation.
+        UpdateExpirationTime update_expiration_time = 11;
+
+        // shutdown operation.
+        Shutdown shutdown = 12;
+    }
+    reserved 13 to 99;
+}
+
+// update session expiration time
+message UpdateExpirationTime {
+
+    // the expiration time (milliseconds from now) to be set
+    uint64 expiration_time = 1;
+}
+
+// kind of shutdown type.
+enum ShutdownType {
+
+    // The default shutdown type.
+    SHUTDOWN_TYPE_NOT_SET = 0;
+
+    // Waits for the ongoing requests and safely shutdown the session.
+    GRACEFUL = 1;
+
+    // Cancelling the ongoing requests and safely shutdown the session.
+    FORCEFUL = 2;
+}
+
+// request shutdown to the session.
+message Shutdown {
+
+    // the shutdown type.
+    ShutdownType type = 1;
+}
\ No newline at end of file
diff --git a/src/tateyama/proto/core/response.proto b/src/tateyama/proto/core/response.proto
new file mode 100644
index 0000000..c90a728
--- /dev/null
+++ b/src/tateyama/proto/core/response.proto
@@ -0,0 +1,35 @@
+syntax = "proto3";
+
+package tateyama.proto.core.response;
+
+option java_multiple_files = false;
+option java_package = "com.tsurugidb.core.proto";
+option java_outer_classname = "CoreResponse";
+
+// empty message
+message Void {}
+
+// unknown error was occurred.
+message UnknownError {
+    // the error message.
+    string message = 1;
+}
+
+// update session expiration time
+message UpdateExpirationTime {
+    reserved 1 to 10;
+
+    // the response body.
+    oneof result {
+        // request is successfully completed.
+        Void success = 11;
+
+        // unknown error was occurred.
+        UnknownError unknown_error = 12;
+    }
+}
+
+// shutdown operation.
+message Shutdown {
+    // no special message
+}
\ No newline at end of file