diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
index 72ee05d7006..61ff9f66871 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/JavaToJKTreeBuilder.kt
@@ -112,9 +112,9 @@ class JavaToJKTreeBuilder(var symbolProvider: JKSymbolProvider) {
             )
         }
 
-        fun PsiInstanceOfExpression.toJK(): JKJavaInstanceOfExpression {
-            return JKJavaInstanceOfExpressionImpl(operand.toJK(), checkType?.toJK() ?: TODO())
-        }
+        fun PsiInstanceOfExpression.toJK(): JKKtIsExpression =
+            JKKtIsExpressionImpl(operand.toJK(), checkType?.toJK() ?: JKTypeElementImpl(JKNoTypeImpl))
+
 
         fun PsiAssignmentExpression.toJK(): JKJavaAssignmentExpression {
             return JKJavaAssignmentExpressionImpl(
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/conversions/InstanceOfConversion.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/conversions/InstanceOfConversion.kt
deleted file mode 100644
index 7132de27fde..00000000000
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/conversions/InstanceOfConversion.kt
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.j2k.conversions
-
-import com.intellij.psi.PsiClass
-import org.jetbrains.kotlin.j2k.ast.Nullability
-import org.jetbrains.kotlin.j2k.tree.*
-import org.jetbrains.kotlin.j2k.tree.impl.*
-import org.jetbrains.kotlin.psi.KtClass
-
-
-class InstanceOfConversion : RecursiveApplicableConversionBase() {
-    override fun applyToElement(element: JKTreeElement): JKTreeElement {
-        if (element !is JKJavaInstanceOfExpression) return recurse(element)
-        val checkingType = element.type.type.updateNullability(Nullability.NotNull)
-        val type =
-            if (checkingType is JKClassType && checkingType.parameters.isEmpty()) {
-                val resolvedClass = checkingType.classReference.target
-                val parametersCount =
-                    when (resolvedClass) {
-                        is PsiClass -> resolvedClass.typeParameters.size
-                        is KtClass -> resolvedClass.typeParameters.size
-                        else -> 0
-                    }
-                val typeParameters = List(parametersCount) { JKStarProjectionTypeImpl() }
-                JKClassTypeImpl(
-                    checkingType.classReference,
-                    typeParameters,
-                    checkingType.nullability
-                )
-
-            } else checkingType
-        return recurse(JKKtIsExpressionImpl(element::expression.detached(), JKTypeElementImpl(type)))
-    }
-}
\ No newline at end of file
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
index e9bc4cddcc4..e19e1c5ded6 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/j.kt
@@ -295,12 +295,6 @@ class JKJavaForLoopStatementImpl(initializer: JKStatement, condition: JKExpressi
     override fun <R, D> accept(visitor: JKVisitor<R, D>, data: D): R = visitor.visitJavaForLoopStatement(this, data)
 }
 
-class JKJavaInstanceOfExpressionImpl(expression: JKExpression, type: JKTypeElement) : JKJavaInstanceOfExpression, JKBranchElementBase(), PsiOwner by PsiOwnerImpl() {
-    override var type by child(type)
-    override var expression by child(expression)
-
-    override fun <R, D> accept(visitor: JKVisitor<R, D>, data: D): R = visitor.visitJavaInstanceOfExpression(this, data)
-}
 
 class JKJavaPolyadicExpressionImpl(operands: List<JKExpression>, override var tokens: List<JKOperator>) : JKJavaPolyadicExpression,
     JKBranchElementBase(), PsiOwner by PsiOwnerImpl() {
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/k.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/k.kt
index 378ecedb5d3..73c31c52a97 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/k.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/impl/k.kt
@@ -229,7 +229,7 @@ class JKKtValueWhenLabelImpl(expression: JKExpression) : JKKtValueWhenLabel, JKB
 }
 
 
-class JKKtIsExpressionImpl(expression: JKExpression, type: JKTypeElement) : JKKtIsExpression, JKBranchElementBase() {
+class JKKtIsExpressionImpl(expression: JKExpression, type: JKTypeElement) : JKKtIsExpression, JKBranchElementBase(), PsiOwner by PsiOwnerImpl() {
     override var type by child(type)
     override var expression by child(expression)
 
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
index dc7febd1719..5a67848bd5c 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/j.kt
@@ -88,10 +88,6 @@ interface JKJavaForLoopStatement : JKLoopStatement {
     var updaters: List<JKStatement>
 }
 
-interface JKJavaInstanceOfExpression : JKExpression {
-    var expression: JKExpression
-    var type: JKTypeElement
-}
 
 interface JKJavaPolyadicExpression : JKExpression {
     var operands: List<JKExpression>
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/k.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/k.kt
index e26a377862c..901a389bf3f 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/k.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/k.kt
@@ -81,7 +81,7 @@ interface JKKtValueWhenLabel : JKKtWhenLabel {
     var expression: JKExpression
 }
 
-interface JKKtIsExpression : JKExpression {
+interface JKKtIsExpression : JKExpression, PsiOwner {
     var expression: JKExpression
     var type: JKTypeElement
 }
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
index 87bdea3c131..fb48358da63 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/types.kt
@@ -7,24 +7,25 @@ package org.jetbrains.kotlin.j2k.tree
 
 import com.intellij.psi.*
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.builtins.PrimitiveType
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.caches.resolve.util.getJavaClassDescriptor
 import org.jetbrains.kotlin.j2k.ConversionContext
 import org.jetbrains.kotlin.j2k.JKSymbolProvider
 import org.jetbrains.kotlin.j2k.ast.Nullability
 import org.jetbrains.kotlin.j2k.conversions.resolveFqName
+import org.jetbrains.kotlin.j2k.kotlinTypeByName
 import org.jetbrains.kotlin.j2k.tree.impl.*
 import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.psi.KtClass
+import org.jetbrains.kotlin.psi.KtNullableType
 import org.jetbrains.kotlin.psi.KtTypeElement
 import org.jetbrains.kotlin.psi.KtUserType
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 
-import org.jetbrains.kotlin.idea.caches.resolve.util.*
-import org.jetbrains.kotlin.j2k.kotlinTypeByName
-import org.jetbrains.kotlin.psi.KtNullableType
-
 fun JKExpression.type(context: ConversionContext): JKType? =
     when (this) {
         is JKLiteralExpression -> type.toJkType(context.symbolProvider)
@@ -43,7 +44,7 @@ fun JKExpression.type(context: ConversionContext): JKType? =
         is JKKtThrowExpression -> kotlinTypeByName(KotlinBuiltIns.FQ_NAMES.nothing.asString(), context.symbolProvider)
         is JKClassAccessExpression -> null
         is JKJavaNewExpression -> JKClassTypeImpl(classSymbol)
-        is JKJavaInstanceOfExpression -> kotlinTypeByName(KotlinBuiltIns.FQ_NAMES._boolean.asString(), context.symbolProvider)
+        is JKKtIsExpression -> kotlinTypeByName(KotlinBuiltIns.FQ_NAMES._boolean.asString(), context.symbolProvider)
         is JKParenthesizedExpression -> expression.type(context)
         is JKTypeCastExpression -> type.type
         is JKThisExpression -> null// TODO return actual type
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitor.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitor.kt
index 2d5df73a120..57253395dd7 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitor.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitor.kt
@@ -90,7 +90,6 @@ interface JKVisitor<out R, in D> {
     fun visitReturnStatement(returnStatement: JKReturnStatement, data: D): R = visitStatement(returnStatement, data)
     fun visitJavaAssertStatement(javaAssertStatement: JKJavaAssertStatement, data: D): R = visitStatement(javaAssertStatement, data)
     fun visitJavaForLoopStatement(javaForLoopStatement: JKJavaForLoopStatement, data: D): R = visitLoopStatement(javaForLoopStatement, data)
-    fun visitJavaInstanceOfExpression(javaInstanceOfExpression: JKJavaInstanceOfExpression, data: D): R = visitExpression(javaInstanceOfExpression, data)
     fun visitJavaPolyadicExpression(javaPolyadicExpression: JKJavaPolyadicExpression, data: D): R = visitExpression(javaPolyadicExpression, data)
     fun visitJavaAssignmentExpression(javaAssignmentExpression: JKJavaAssignmentExpression, data: D): R = visitExpression(javaAssignmentExpression, data)
     fun visitJavaThrowStatement(javaThrowStatement: JKJavaThrowStatement, data: D): R = visitStatement(javaThrowStatement, data)
diff --git a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitorVoid.kt b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitorVoid.kt
index 8b0f7b2f9bd..17b010cdedd 100644
--- a/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitorVoid.kt
+++ b/j2k/newSrc/org/jetbrains/kotlin/j2k/tree/visitors/JKVisitorVoid.kt
@@ -177,8 +177,6 @@ interface JKVisitorVoid : JKVisitor<Unit, Nothing?> {
     override fun visitJavaAssertStatement(javaAssertStatement: JKJavaAssertStatement, data: Nothing?) = visitJavaAssertStatement(javaAssertStatement)
     fun visitJavaForLoopStatement(javaForLoopStatement: JKJavaForLoopStatement) = visitLoopStatement(javaForLoopStatement, null)
     override fun visitJavaForLoopStatement(javaForLoopStatement: JKJavaForLoopStatement, data: Nothing?) = visitJavaForLoopStatement(javaForLoopStatement)
-    fun visitJavaInstanceOfExpression(javaInstanceOfExpression: JKJavaInstanceOfExpression) = visitExpression(javaInstanceOfExpression, null)
-    override fun visitJavaInstanceOfExpression(javaInstanceOfExpression: JKJavaInstanceOfExpression, data: Nothing?) = visitJavaInstanceOfExpression(javaInstanceOfExpression)
     fun visitJavaPolyadicExpression(javaPolyadicExpression: JKJavaPolyadicExpression) = visitExpression(javaPolyadicExpression, null)
     override fun visitJavaPolyadicExpression(javaPolyadicExpression: JKJavaPolyadicExpression, data: Nothing?) = visitJavaPolyadicExpression(javaPolyadicExpression)
     fun visitJavaAssignmentExpression(javaAssignmentExpression: JKJavaAssignmentExpression) = visitExpression(javaAssignmentExpression, null)