diff --git a/Pipfile b/Pipfile
index f3e2cbf..5fa28ad 100644
--- a/Pipfile
+++ b/Pipfile
@@ -17,7 +17,7 @@ jupyterlab = "==1.0.2"
 jupytext = "==1.2.0"
 livelossplot = "==0.4.1"
 matplotlib = "==3.1.1"
-netcdf4 = "==1.4.1"
+netcdf4 = "==1.4.2"
 numpy = "==1.17.3"
 optuna = "==2.0.0"
 pandas = "==0.25.0"
diff --git a/Pipfile.lock b/Pipfile.lock
index d0010a0..e4655e3 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "a105dfdec0b383ad49a8b90aea1a40aa675a97709c9f76049cf507f4657b9379"
+            "sha256": "64b2c8634ee564432efa919286bd3d101a31f083d8cf7c8841e87ec97c25b809"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -208,8 +208,8 @@
         },
         "chainer": {
             "hashes": [
-                "sha256:bf9933b5572712f5f748fd244cf2d54abc75c6d536e070cbc8030f705e700367",
-                "sha256:409583cfda4a4fee0cf2fbacbfa73cf258eec6eef08db6cd2ac7cc1f08294168"
+                "sha256:409583cfda4a4fee0cf2fbacbfa73cf258eec6eef08db6cd2ac7cc1f08294168",
+                "sha256:bf9933b5572712f5f748fd244cf2d54abc75c6d536e070cbc8030f705e700367"
             ],
             "index": "pypi",
             "version": "==7.0.0"
@@ -309,20 +309,20 @@
         },
         "cupy-cuda100": {
             "hashes": [
-                "sha256:04de0c78adf098cf1b3f80eab42fe336178dc2ecf6258753c49b9ebbf79c00ca",
+                "sha256:53238f0992e8f89263f87d6a33ec029563b4c854d0aa6fd509a9b099517f053a",
+                "sha256:f220bac01f43b94e0764738cb175e19f48d01e73d98ef1468e299efab2416bb7",
                 "sha256:1f3f57cd0a149c38f5c23447ab571167a116b7aa9ba303ca7d3872def6423939",
                 "sha256:9334cd82f467be2eb624917e040dcc4c37094c9ef2fb1284e51b5e9d4f75fb9b",
-                "sha256:b8f26cf299ed42fdbf034613dde0c67ef47210e43467c64969dfcfbecbb5c994",
-                "sha256:ba5f40bd2bb3effff11f5eaf44b631935261564c9e655de84aab21bda0e049f9",
-                "sha256:f220bac01f43b94e0764738cb175e19f48d01e73d98ef1468e299efab2416bb7",
-                "sha256:162a24cda64145d590836dee655ef17f5a1932e4ca81cb507f2512ed21442c48",
-                "sha256:f1ccaeee1fff4855b1fa12aeef34a4020ebdd7dd3643ae23341f68b187d8e6f5",
-                "sha256:53238f0992e8f89263f87d6a33ec029563b4c854d0aa6fd509a9b099517f053a",
-                "sha256:af97a3d1866e45d020701cae2aa1514489919dede83679b0382a292d1ae360eb",
                 "sha256:ebc59907d7efbe15cab76507629f820b4580ecdca0623fe52e4d687d36ac862c",
-                "sha256:dae407078166557b7c4b46e83acf39e63a6a19e2ac9849568c9952eaaffbe19b",
                 "sha256:76dea699a593715a580236c1ac2ec8ad1c3280431acb2cfaf9c11b468c322b9a",
-                "sha256:851e0e73d51997dc076ff027dcabdcc842cc47ab0197b86ff4c36d7d01fa59c6"
+                "sha256:af97a3d1866e45d020701cae2aa1514489919dede83679b0382a292d1ae360eb",
+                "sha256:162a24cda64145d590836dee655ef17f5a1932e4ca81cb507f2512ed21442c48",
+                "sha256:851e0e73d51997dc076ff027dcabdcc842cc47ab0197b86ff4c36d7d01fa59c6",
+                "sha256:04de0c78adf098cf1b3f80eab42fe336178dc2ecf6258753c49b9ebbf79c00ca",
+                "sha256:ba5f40bd2bb3effff11f5eaf44b631935261564c9e655de84aab21bda0e049f9",
+                "sha256:b8f26cf299ed42fdbf034613dde0c67ef47210e43467c64969dfcfbecbb5c994",
+                "sha256:dae407078166557b7c4b46e83acf39e63a6a19e2ac9849568c9952eaaffbe19b",
+                "sha256:f1ccaeee1fff4855b1fa12aeef34a4020ebdd7dd3643ae23341f68b187d8e6f5"
             ],
             "index": "pypi",
             "version": "==7.0.0"
@@ -809,34 +809,62 @@
         },
         "netcdf4": {
             "hashes": [
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-                "sha256:11829a2572b985f9e202d5b550b52334a2ecf66dbfa7af69e6112c9ebf8b03d2",
+                "sha256:848512566ced82fd46c20a8ccff8e72d1ef863997f5d3e32e61994312b94c24f",
+                "sha256:a269c2a375ef1361be462d6c04c3a55bc8e6e717ff1d2eed20b2e188459fbb81",
+                "sha256:31046ec63bfe3d26c6e44b1fc66e871ae2311342cf9ebab9a21eb1fb6f21a600",
+                "sha256:bcec0c725e5aeba299cd43bf10dce5c62513dfb14a377abd1a76234cfa34f4ce",
+                "sha256:23b8219de812ed754c84e8eb51ac97393e3c174ec2cd749f72e8ab112a8037ce",
                 "sha256:1876219e90ce68cef76b7fcaa2dfbe847ece251296fabd55f5d6a7d9be6383d7",
-                "sha256:18fbcb26c3005cbae4de160bc22eacd757b3de248278d8e30f03ab27d2d4ded0",
-                "sha256:45ee95cba5f5891a11bc0f9c69947c1e9a764e88a1aa7e0b38fae8974f983b98",
-                "sha256:579a814b373336563f3a38b772ba459ff81222efad9376bc9fe090b882fc8dfc",
+                "sha256:b934af350459cf9041bcdf5472e2aa56ed7321c018d918e9f325ec9a1f9d1a30",
                 "sha256:5ad5a92faa2ce3bf80d8451cca5272948561dbd25a6eea232670a0ccead9f05c",
-                "sha256:61e84511575618857b1069db385817974c725fa9fed084218c670d6cd29e5c55",
+                "sha256:d4fc65b98e348c39d082ab6b4b7f6d636b1b4e63bec016e5bca189fee5d46403",
+                "sha256:cab62d95c8deb822ac3ecd8dc78043bb163d95b2568b4e93b3baa438d8324edf",
                 "sha256:70d9424d8b3ce097e190a8e5fc4dd8b2642a88a38bb99e39c4ddae873dcd1cb6",
-                "sha256:86e114c8a58b72ce89c29575912d60c5efbbc582f33eb32cf68bfade31d07a27",
+                "sha256:b0c8b04c4f0b3d99952627e6c1e63701b9127660f81885c91f681a6497ce2107",
+                "sha256:def8226a7806e1084abfa43318796b4c806eda4b14a013e2c072468eba8d91e3",
+                "sha256:02e5112b768936f66364f9e05f0433d418cf75d83a94ae28f727e355fd28c6d2",
+                "sha256:c882d557341560ff3b111e40f553f9a88fa6e73132acfee790e2b97b2f42b568",
+                "sha256:55436d010b07c97a465ab9fdbd823349dd1f2e7d61b2b5418b5987e9ddcf865a",
+                "sha256:5760ad85be180875fb09ea189323c7b3a8b3dd7ef17f5cb977deeb968e3a6aba",
+                "sha256:252c0b3ea74e15b31ba78ef72e5bddbc4844c1cadc1daf0a1d643a9018087953",
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                 "sha256:917f0e18bc9e53413cefccd86b71f0a5a627769f28f2803feeffaaffd42517be",
-                "sha256:a269c2a375ef1361be462d6c04c3a55bc8e6e717ff1d2eed20b2e188459fbb81",
-                "sha256:ac1ae16300eb5c90db9d468a6c976a856bfacafe1ee4a9be7ad6310b10e88a0f",
-                "sha256:aebc09dd071de3976d35b9acd4d3f2ca74e2656a07464f7bc7a9e4082b5ee9b0",
+                "sha256:28b9757a7693961653d28b09053de35b2f4f9493c76b5dc7ca419daaacf3c413",
+                "sha256:304542d1074d13eb51fb8a47d96c60e590a71e134a3b9e25ffea6ef9999e8f4f",
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+                "sha256:f1cad3f65a0784c7bb7d0dd1c85af2900602e2d8067652184a742ca70daf56fc",
+                "sha256:d35a138545c10a3153ce8dc28af6bba61d6c5e318769c769687e876fdbaf3503",
+                "sha256:18fbcb26c3005cbae4de160bc22eacd757b3de248278d8e30f03ab27d2d4ded0",
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                 "sha256:b1ea54ccf3c1dc46a3a7463708d4f1470e94892c5c9754d9c35a103b75d82c70",
-                "sha256:ba231ce919cef00b251f89b7406cc3117c60fc32519665bbf7912921bf425f8f",
-                "sha256:c0dab6916693b5eaae89740eaab1a50ba337c6c280d923e1552d638600e1d7e0",
-                "sha256:c7d5a748c570a9342e9b1280ef021c2219739fd2fe5a8ce02eb970ffee1f5c36",
-                "sha256:cab62d95c8deb822ac3ecd8dc78043bb163d95b2568b4e93b3baa438d8324edf",
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                 "sha256:cac34ec37e115a2762741a288db7be9b3256b6deb4a9bb0cdb7e207c3f6fb0b2",
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-                "sha256:def8226a7806e1084abfa43318796b4c806eda4b14a013e2c072468eba8d91e3",
+                "sha256:61e84511575618857b1069db385817974c725fa9fed084218c670d6cd29e5c55",
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                 "sha256:e943f3f4e209ad1f3284406097d7bf47da5176840923e30f0bdcfe85d38c4f7f",
-                "sha256:ec07c03f102eef4566131f5b5451eff5ca5761874e3ce81a8b124556d0ebed52",
-                "sha256:f1cad3f65a0784c7bb7d0dd1c85af2900602e2d8067652184a742ca70daf56fc"
+                "sha256:45ee95cba5f5891a11bc0f9c69947c1e9a764e88a1aa7e0b38fae8974f983b98",
+                "sha256:3c1f52d5276c69f07aec09265615aaddf9362fed32ad4e4f6eb92437861a1c03",
+                "sha256:aebc09dd071de3976d35b9acd4d3f2ca74e2656a07464f7bc7a9e4082b5ee9b0",
+                "sha256:a9bf9e78369969dedcdbd72dd78b76a002bc52fb59e751ba506c2dc7cae9f027",
+                "sha256:a6d83984eeabcaae248c5582667ca0795b38e4eb901152da39c6e2f5ee42a9e5",
+                "sha256:090a393852c791ddf2ace7378a6650f95a981f51d6c64f4bf066104e43c5c0fc",
+                "sha256:056210e83688b104b71281ab9fe45e5fd945d65580cc8030865921e78016cf6f",
+                "sha256:ec07c03f102eef4566131f5b5451eff5ca5761874e3ce81a8b124556d0ebed52"
             ],
             "index": "pypi",
-            "version": "==1.4.1"
+            "version": "==1.4.2"
         },
         "netifaces": {
             "hashes": [
@@ -881,43 +909,43 @@
         },
         "numpy": {
             "hashes": [
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+                "sha256:f13346f932c0ea879df223264a438c75745632c2e0e4144f83824b7692ffe605",
+                "sha256:c867eeccd934920a800f65c6068acdd6b87e80d45cd8c8beefff783b23cdc462",
+                "sha256:4f2a2b279efde194877aff1f76cf61c68e840db242a5c7169f1ff0fd59a2b1e2"
             ],
             "index": "pypi",
             "version": "==1.17.3"