diff --git a/src/Factory/RikishiFactory.php b/src/Factory/RikishiFactory.php
index 878c25e..ca0b836 100644
--- a/src/Factory/RikishiFactory.php
+++ b/src/Factory/RikishiFactory.php
@@ -14,7 +14,7 @@ public function build(stdClass $rikishiData): Rikishi
     {
         return new Rikishi(
             $rikishiData->id,
-            $rikishiData->shikonaEn,
+            $rikishiData->shikonaEn ?? null,
             $rikishiData->sumodbId ?? null,
             $rikishiData->nskId ?? null,
             $rikishiData->shikonaJp ?? null,
diff --git a/src/Model/Rikishi.php b/src/Model/Rikishi.php
index 89bdec5..1095adf 100644
--- a/src/Model/Rikishi.php
+++ b/src/Model/Rikishi.php
@@ -10,7 +10,7 @@
 {
     public function __construct(
         public int $id,
-        public string $shikonaEn,
+        public ?string $shikonaEn,
         public ?int $sumoDbId,
         public ?int $nskId,
         public ?string $shikonaJp,