diff --git a/lib/opal/cli_runners.rb b/lib/opal/cli_runners.rb
index ce81bd9c8d..5d341e2284 100644
--- a/lib/opal/cli_runners.rb
+++ b/lib/opal/cli_runners.rb
@@ -76,7 +76,6 @@ def self.alias_runner(new_name, old_name)
     register_runner :compiler,    :Compiler,    'opal/cli_runners/compiler'
     register_runner :deno,        :Deno,        'opal/cli_runners/deno'
     register_runner :firefox,     :Firefox,     'opal/cli_runners/firefox'
-    register_runner :nashorn,     :Nashorn,     'opal/cli_runners/nashorn'
     register_runner :nodejs,      :Nodejs,      'opal/cli_runners/nodejs'
     register_runner :quickjs,     :Quickjs,     'opal/cli_runners/quickjs'
     register_runner :server,      :Server,      'opal/cli_runners/server'
diff --git a/lib/opal/cli_runners/nashorn.rb b/lib/opal/cli_runners/nashorn.rb
deleted file mode 100644
index a6baecd1ba..0000000000
--- a/lib/opal/cli_runners/nashorn.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-require 'opal/paths'
-require 'opal/cli_runners/system_runner'
-
-module Opal
-  module CliRunners
-    class Nashorn
-      def self.call(data)
-        # Allow to change path if using GraalVM, see:
-        # https://github.com/graalvm/graaljs/blob/master/docs/user/NashornMigrationGuide.md#launcher-name-js
-        exe = ENV['NASHORN_PATH'] || 'jjs'
-
-        SystemRunner.call(data) do |tempfile|
-          [exe, tempfile.path, *data[:argv]]
-        end
-      rescue Errno::ENOENT
-        raise MissingNashorn, 'Please install JDK or GraalVM to be able to run Opal scripts.'
-      end
-
-      class MissingNashorn < RunnerError
-      end
-    end
-  end
-end
diff --git a/stdlib/nashorn.rb b/stdlib/nashorn.rb
deleted file mode 100644
index 9ee60f3ea3..0000000000
--- a/stdlib/nashorn.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-module Nashorn
-end
-
-require 'nashorn/io'
-require 'nashorn/file'
diff --git a/stdlib/nashorn/file.rb b/stdlib/nashorn/file.rb
deleted file mode 100644
index 46bbbde819..0000000000
--- a/stdlib/nashorn/file.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-# backtick_javascript: true
-
-`/* global Java */`
-
-require 'corelib/file'
-
-class File
-  def self.read(path)
-    %x(
-        var Paths = Java.type('java.nio.file.Paths');
-        var Files = Java.type('java.nio.file.Files');
-        var lines = Files.readAllLines(Paths.get(path), Java.type('java.nio.charset.StandardCharsets').UTF_8);
-        var data = [];
-        lines.forEach(function(line) { data.push(line); });
-        return data.join("\n");
-      )
-  end
-
-  def self.file?(path)
-    %x{
-      var Files = Java.type('java.nio.file.Files');
-      return Files.exists(path) && Files.isRegularFile(path);
-    }
-  end
-
-  def self.readable?(path)
-    %x{
-      var Files = Java.type('java.nio.file.Files');
-      return Files.exists(path) && Files.isReadable(path);
-    }
-  end
-end
diff --git a/stdlib/nashorn/io.rb b/stdlib/nashorn/io.rb
deleted file mode 100644
index d70850c818..0000000000
--- a/stdlib/nashorn/io.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-# backtick_javascript: true
-
-$stdout.write_proc = `function(s){print(s)}`
-$stderr.write_proc = `function(s){print(s)}`
diff --git a/stdlib/opal-platform.rb b/stdlib/opal-platform.rb
index 2b4bdcbb21..1ee8ae726d 100644
--- a/stdlib/opal-platform.rb
+++ b/stdlib/opal-platform.rb
@@ -1,12 +1,11 @@
 # backtick_javascript: true
 
-`/* global Java, GjsFileImporter, Deno, Bun */`
+`/* global GjsFileImporter, Deno, Bun */`
 
 browser          = `typeof(document) !== "undefined"`
 bun              = `typeof(Bun) === "object" && typeof(Bun.version) === "string"`
 deno             = `typeof(Deno) === "object" && typeof(Deno.version) === "object"`
 node             = `typeof(process) !== "undefined" && process.versions && process.versions.node`
-nashorn          = `typeof(Java) !== "undefined" && Java.type`
 headless_chrome  = `typeof(opalheadlesschrome) !== "undefined"`
 headless_firefox = `typeof(opalheadlessfirefox) !== "undefined"`
 safari           = `typeof(opalsafari) !== "undefined"`
@@ -14,9 +13,7 @@
 quickjs          = `typeof(window) === "undefined" && typeof(__loadScript) !== "undefined"`
 opal_miniracer   = `typeof(opalminiracer) !== "undefined"`
 
-OPAL_PLATFORM = if nashorn
-                  'nashorn'
-                elsif bun
+OPAL_PLATFORM = if bun
                   'bun'
                 elsif deno
                   'deno'
diff --git a/stdlib/opal/platform.rb b/stdlib/opal/platform.rb
index 13321cfb1b..857f82629d 100644
--- a/stdlib/opal/platform.rb
+++ b/stdlib/opal/platform.rb
@@ -1,7 +1,6 @@
 require 'opal-platform'
 
 case OPAL_PLATFORM
-when 'nashorn'          then require 'nashorn'
 when 'gjs'              then require 'gjs'
 when 'quickjs'          then require 'quickjs'
 when 'deno'             then require 'deno/base'